44 results for Back End Engineer jobs

Backend Engineer

Tokyo,
remote
Permanent
8.5M - 10.0M JPY / Yearly
Company Profile[Backend Engineer] Seeking a core member to support the growth of our enterprise SaaS product! We are a leading data intelligence platform that is being adopted by major Japanese companies one after another. We are looking for a Backend Engineer to support the quality of our SaaS product, which is the core of our SaaS product, and help it evolve further.Although we are a fast-growing startup, we have already developed and provided products that have been implemented by many enterprise customers, including prime listed companies. This is an ideal field for those who want to focus on "quality" as an engineer, and for those who seek both the speed and professionalism of a startup. Selling points<ul><li>The value of being a Japanese engineer who is serious about usability for Japanese users</li><li>Collaboration with a global team where English is the common language</li><li>Work on the core of product development and experience continuous improvement and growth</li><li>Full Remote / Work from home Full remote or in-coming options. Flexible work style and a culture based on trust.</li></ul>The Role<ul><li>Development and improvement of back-end functionality with a focus on Golang</li><li>Localization proposals and implementation for an intuitive and easy-to-understand UX for Japanese users</li><li>Collaboration with other teams (front-end, PM, etc.) and technical documentation</li><li>Active participation in technical discussions and improvement proposals within the team</li><li>Implementation and review with high code quality in mind</li></ul>Technology Stacks<ul><li>Frontend: React, Remix, Tailwind CSS</li><li>Backend: Go (Goa framework)</li><li>Infrastructure: AWS, Vercel, Terraform Cloud</li><li>Authentication: Auth0, Cognito</li><li>Database: DynamoDB, OpenSearch</li><li>CI/CD: GitHub</li><li>Communication: Slack, Linear, Notion</li></ul>Required Skills<ul><li>Back-end development experience: 3+ years (working experience with Golang a plus)</li><li>Experience working in English (including speaking, reading and writing): 2+ years</li></ul>Skills and Experience<ul><li>Implementation of Japanese search functionality (e.g. Elasticsearch)</li><li>Knowledge of data management, analysis, and engineering</li><li>Experience developing and operating BtoB SaaS products</li><li>Experience working in a startup environment</li><li>Computer science degree</li></ul>We welcome people like this<ul><li>People who value teamwork and can take initiative</li><li>People who want to provide great value to society through Japan's first SaaS product</li><li>People who enjoy the discretion and speed of a startup</li><li>People who are excited about the future of enterprise data management</li><li>People who share our mission and vision You are excited about the future of enterprise data management You share our mission and vision</li></ul>Location<ul><li>In principle, remote work (in Japan)</li><li>Office work in Hamamatsucho, Minato-ku, Tokyo (nearest: Hamamatsucho Station) is also possible if desired.</li></ul>Reference number：06940-0013260015By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuODE1MDUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-15T01:56:53Z

Sr Backend Engineer - Build the Future of enterprise AI

Tokyo,
remote
Permanent
10.0M - 15.0M JPY / Yearly
Ready to Shape the Future of Enterprise Data Management? Join a dynamic Tokyo-based technology company that's revolutionizing how Japan's largest enterprises handle their most valuable asset: data. We're seeking an exceptional Principal Backend Engineer to lead our technical excellence while building solutions that directly impact major corporations across Japan. WHY THIS OPPORTUNITY IS SPECIALJoin a Series A funded company with strong market position in enterprise data intelligence. Your work will directly impact how major Japanese corporations make data-driven decisions. Build with a modern tech stack: Go, React, AWS, OpenSearch, DynamoDB. Tackle challenges like scalable metadata systems, real-time data pipelines, and intelligent data discovery algorithms. Solve unique problems combining human collaboration with automated intelligence - creating systems that turn organizational behaviors into actionable insights for enterprise clients. As Principal Engineer, you'll architect cutting-edge solutions while mentoring a growing engineering team, shaping both technology and culture. WHAT YOU'LL DO You'll spearhead the development of our core data intelligence platform, ensuring exceptional quality while leading technical initiatives that serve Japan's most demanding enterprise clients:Drive architectural decisions and maintain excellence standards across our engineering organization Build robust, scalable backend systems using modern technologies including Go, Python, and cloud-native architectures Mentor engineers and foster a collaborative environment where innovation thrives Work closely with product leadership, sales, and customer success teams to ensure our technology meets real business needs Champion best practices that deliver the high-quality, intuitive experiences Japanese enterprise clients expect WHAT WE'RE LOOKING FOR Essential Requirements:10+ years of backend development expertise with proven track record in system architecture 5+ years leading development teams and driving technical excellence Strong experience with enterprise software development from concept to production Proficiency in modern programming languages (Go, Python, Java, or C++ preferred) Business-level English communication skills essential Currently based in Japan or hold a valid Japanese work visaBonus Points:Enterprise client-facing software development experience Data pipeline, analytics, or AI/ML technology background Japanese language capabilities Experience with data management or engineering platforms WHY YOU'LL LOVE WORKING HEREEnjoy hybrid work arrangements with 1-2 days in our conveniently located Tokyo office, plus flexible hours that respect work-life balance. Work in an international environment where all documentation is in English, bringing together diverse perspectives and expertise. Join during a pivotal growth phase where your contributions directly shape company direction and your own professional development. Your work powers critical decisions at some of Japan's most influential corporations, contributing to the country's digital transformation. Be part of a team that values novel approaches and cutting-edge solutions in the rapidly evolving data intelligence field. THE INTERVIEW EXPERIENCE We respect your time with a streamlined process: just two comprehensive interviews focusing on technical expertise and cultural alignment, with no coding tests required. Reference Number: 06940-0013273920By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S2hhbmcuTGUuNzI3NDUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-08-05T02:34:23Z

Backend Engineer

Tokyo,
remote
Contract
11.9M - 11.9M JPY / Yearly
Client ProfileA group company of a global automobile manufacturer, specializing in software development for the mobility domain. The mission is to drive the future of mobility through cutting-edge technology and seamless integration of software and vehicles. The Role<ul><li>Daily monitoring and operational management to ensure the stable performance of software products</li><li>Smooth collaboration and communication within and across teams</li><li>Responding to user inquiries and providing technical support</li><li>Creating and maintaining documentation for technical specifications and operational procedures</li><li>Implementing minor bug fixes and feature enhancements</li><li>Designing and executing test cases to ensure product quality</li><li>Applying security patches and maintaining overall system security</li><li>Conducting code reviews to enhance code quality and share knowledge</li><li>Performance optimization and troubleshooting during incidents</li><li>Analyzing data and gathering feedback for continuous improvement of user experience and product quality</li><li>Participating in quarterly team reporting</li><li>Actively engaging in Agile (Scrum) development processes</li></ul>Salary Hourly rate: JPY 5,730Location Tokyo Reference Number：06940-0013251275 By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy" target="_blank">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/VG9tb2UuTW91bnRlZXIuNDM2MjEuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-15T04:45:46Z

Technical Leader / Principal Backend Engineer

Tokyo,
remote
Permanent
10.0M - 12.0M JPY / Yearly
【Principal Backend Engineer】We are looking for a technical leader to play a central role in a fast-growing SaaS product!<ul><li>A fast-growing enterprise SaaS product that is being adopted by major companies. We are looking for a Principal Backend Engineer to lead the backend development and raise the team's technical capabilities and quality.</li><li>This is not just a "development lead," but a position where you can make decisions and exert influence across the three axes of technology, business, and organization.</li></ul>Selling points<ul><li>Technology and design decision-making authority to support mid- to long-term product growth</li><li>Bilingual engineering organization at the intersection of local and global</li><li>Deep involvement in strategy with an understanding of both product development and business</li><li>Flexible work style with flextime and remote work OK</li></ul>The Role<ul><li>Develop and improve back-end functionality and design reviews for our SaaS products</li><li>Improve code quality and design capabilities of the entire team and build a review culture</li><li>Technical and strategic collaboration with stakeholders (product, sales, support)</li><li>Lead high-quality localization for the Japanese market</li><li>Improve development process, Team development, formulation of design guidelines</li><li>Make and lead decisions with a mid- to long-term perspective, including technology selection and infrastructure design</li></ul>Technology Stacks<ul><li>Front-end: React, Remix, Tailwind CSS</li><li>Back-end: Go (Goa), Python</li><li>Infrastructure and CI/CD: AWS, GCP, Azure, Vercel, Terraform Cloud, GitHub</li><li>Database: DynamoDB,. OpenSearch, Databricks</li><li>Authentication infrastructure: Auth0, Amazon Cognito</li><li>Knowledge and documentation: Notion, Google Workspace</li><li>Communication: Slack, Linear</li></ul>Required Skills and Experience<ul><li>10+ years of back-end development experience (working experience in Go or Python preferred)</li><li>5+ years of experience leading development teams (including code review, design guidance, and training)</li><li>2+ years of practical communication (spoken and written) in English</li></ul>Welcomed Skills and Knowledge<ul><li>Experience developing and operating enterprise software products</li><li>Experience utilizing Japanese natural language processing, search algorithms, and AI technologies</li><li>Deep knowledge of data infrastructure design, ETL, and data governance</li></ul>What we look for in a person<ul><li>You can focus on the success and growth of the team as much as your own achievements</li><li>You want to be involved in the product from both a technical and business perspective</li><li>You have the flexibility to enjoy the speed and change unique to startups</li><li>You are interested in the future of BtoB SaaS and enterprise data in Japan</li><li>You find a mission-driven environment challenging You are interested in the future of BtoB SaaS and enterprise data in Japan.</li></ul>Work Environment<ul><li>Working hours: Full remote available (hybrid system with option to come in 1-3 days a week)</li><li>Office location: Minato-ku, Tokyo (Hamamatsucho area)</li><li>Employment status: Full-time</li><li>Working hours: Flextime system (core hours 11:00-15:00)</li><li>Holidays: Weekends, holidays, annual paid vacation, special leave upon hire</li></ul>Reference number：06940-0013260019By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuMTgyNDAuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-15T02:28:59Z

Senior Front-end developer

Tokyo,
remote
Permanent
10.0M - 10.1M JPY / Yearly
Senior Front-end DeveloperCompany OverviewA global leader in AI-powered contract review solutions, adopted by companies and law firms worldwide.Job Description<ul><li>Develop and enhance front-end components of our proprietary products</li><li>Collaborate with UI/UX designers and back-end engineers</li><li>Design and implement fast, scalable web interfaces</li><li>Research and adopt cutting-edge technologies to improve code quality</li><li>Provide technical guidance to junior engineers</li></ul>Qualifications<ul><li>5+ years of front-end development experience</li><li>Hands-on experience with JavaScript frameworks such as React, Vue.js, or Angular</li><li>Proficiency in HTML5, CSS3, Git, Webpack</li><li>Strong understanding of UI/UX and performance optimization</li><li>Business-level English communication skills (for collaboration with global teams)</li></ul>Location<ul><li>Tokyo, Japan</li></ul>Reference Number06940-0013197256 By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/VmljdG9yaWFSeW8uOTk4NTUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-09-02T05:58:39Z

Software Engineer

Tokyo,
remote
Permanent
7.0M - 12.0M JPY / Yearly
<h2 data-start="77" data-end="134">Join Us in Building the Future of Security Learning</h2>We are developing a system that enables people to efficiently and practically gain security knowledge, by personalizing learning based on each individual's skill level and activity history. Our engineering-driven team is at the heart of this initiative, creating impactful products that make real-world learning more effective.We're now looking to welcome two new engineers to the core development team driving this mission forward.<hr data-start="582" data-end="585" /><h2 data-start="587" data-end="623">Open Positions (1 person each)</h2><h3 data-start="625" data-end="666">① Backend & Infrastructure Engineer</h3>You'll be responsible for building and operating a robust, scalable, and secure infrastructure to support our product-mainly using Python and AWS.<h3 data-start="819" data-end="877">② Product Engineer (Feature & User Experience Focus)</h3>You'll work closely with the PdM and designers to create valuable features from scratch, building experiences that directly improve how users learn and grow.<hr data-start="1041" data-end="1044" /><h2 data-start="1046" data-end="1064">Why Join Us?</h2><h3 data-start="1066" data-end="1106">High autonomy in a close-knit team</h3>A nimble team structure where you can take initiative and focus deeply on development.<h3 data-start="1195" data-end="1235">Fully remote & flexible work style</h3>Work from anywhere, anytime. The only in-person requirement is for occasional team events.<h3 data-start="1328" data-end="1358">A learning-first culture</h3>We actively support continuous learning with book and exam subsidies, regular internal tech talks, and study groups.<h3 data-start="1481" data-end="1543">Real impact in the growing field of Security × Education</h3>You'll build a product that contributes directly to society, while expanding both your technical expertise and domain perspective.<hr data-start="1680" data-end="1683" /><h2 data-start="1685" data-end="1713">What We're Looking For</h2>We welcome candidates with the following skills and experience:<ul data-start="1784" data-end="2061"><li data-start="1784" data-end="1827">4+ years of web application development</li><li data-start="1828" data-end="1882">Backend experience in Python or TypeScript</li><li data-start="1883" data-end="1924">2+ years of development using AWS</li><li data-start="1925" data-end="2012">1+ year of experience with IaC tools like Terraform, CloudFormation, or Ansible</li><li data-start="2013" data-end="2061">Experience working in Agile or Scrum teams</li></ul>Experience in security or education is not required-but curiosity and a willingness to learn are highly valued!<hr data-start="2178" data-end="2181" /><h2 data-start="2183" data-end="2211">🛠 Our Tech Stack & Tools</h2>Languages & Frameworks Python (Django, DRF), TypeScript (Next.js, React)Infrastructure AWS (ECS, Lambda, CloudFormation, ECR), Terraform, DockerDatabase & Others PostgreSQL, Redis, Elasticsearch, GitHub Actions, SentryAI / LLM Azure OpenAITools We Use Slack, Miro, Figma, ChatGPT, Gather, Cursor, etc.<hr data-start="2554" data-end="2557" /><h2 data-start="2559" data-end="2580">Work Conditions</h2><ul data-start="2582" data-end="3213"><li data-start="2582" data-end="2643">Employment type: Full-time (4-month probation period)</li><li data-start="2644" data-end="2708">Annual salary: ¥7M-¥12M (based on experience and skills)</li><li data-start="2709" data-end="2798">Work style: Fully remote by default (with a Tokyo office), flexible working hours</li><li data-start="2799" data-end="2928">Time off: Weekends, national holidays, year-end/New Year, summer break, paid leave, and special leave (e.g., bereavement)</li><li data-start="2929" data-end="3213">Benefits:<ul data-start="2949" data-end="3213"><li data-start="2949" data-end="2974">Full social insurance</li><li data-start="2977" data-end="3009">Transportation reimbursement</li><li data-start="3012" data-end="3071">Annual health check (support for full medical checkups)</li><li data-start="3074" data-end="3108">Certification/learning support</li><li data-start="3111" data-end="3142">Internal recognition system</li><li data-start="3145" data-end="3178">Childcare and nursing support</li><li data-start="3181" data-end="3213">Stock ownership plan, and more</li></ul></li></ul> Reference Number: 06940-0013263495By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuNTg3MDAuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-18T00:10:25Z

Software Engineer

Tokyo,
remote
Permanent
8.0M - 16.0M JPY / Yearly
Company Overview<ul><li>A venture company specializing in data utilization platforms in the social infrastructure domain.</li></ul>Job Description<ul><li>Hiring for a Senior Software Engineer position.</li><li>This role is part of a company dedicated to supporting the transformation of enterprise businesses in the deeply interconnected areas of urban infrastructure, healthcare, and public systems, under the philosophy of "turning data into people's energy."</li><li>You will not only act as a technical expert but also deeply engage with both business and social structures, playing a central role in product development.</li></ul>Attractions of the PositionLeading Social Transformation through Product Development:<ul><li>Engage with businesses and municipalities to address societal issues and contribute to fundamental problem-solving through products.</li></ul>Opportunity to "Socially Implement" Cutting-Edge Technology:<ul><li>Gain hands-on experience integrating the latest tech stacks into actual services, including RAG-based generative AI and AI agents, DataOps, Kubernetes, Apache Pulsar, among others, while setting new industry standards.</li></ul>Team Composition Valuing Expertise and Diversity:<ul><li>Collaborate with experts across data, serving, and infrastructure domains, with opportunities to transverse a wide range of technical fields.</li></ul>Flexible Work Styles and Robust Benefits:<ul><li>With a flexible work system, full remote work options, side job allowance, and extensive leave policies, the environment supports long-term career development.</li></ul>Main Responsibilities (Examples):<ul><li>Design, develop, and improve core functions of the data platform and related systems.</li><li>Batch/streaming processing, data warehouse design, ETL/ELT pipeline construction.</li><li>BFF (Backend for Frontend) and front-end development (React/Next.js), contributing to UX design from a technological perspective.</li><li>Design and operate secure, scalable architectures (AWS, Kubernetes, Terraform, etc.).</li><li>Lead technical initiatives within the team, perform code reviews, and improve quality.</li></ul>Qualifications[Required]:<ul><li>Hands-on development experience in at least one of the following: Java, Kotlin, Python, or TypeScript.</li><li>Experience in end-to-end delivery, from system design to operations.</li><li>At least 3 years of practical experience in data pipeline development and operation.</li><li>Demonstrated technical leadership in a team of medium or larger size.</li></ul>[Preferred]:<ul><li>Experience in data engineering and AI/ML utilization.</li><li>Knowledge of design and operation in container environments such as Kubernetes and Docker.</li><li>Development experience for B2B products or enterprise-focused solutions.</li><li>Ability to abstract and materialize specifications based on business requirements.</li></ul>Location:<ul><li>Tokyo, Japan</li></ul>Salary:<ul><li>8,000,000 - 16,000,000 JPY annual salary.</li></ul>Employment Conditions (Excerpts):<ul><li>Work Style: Discretionary labor system for professional work/full remote optional/side jobs allowed.</li><li>Location: Minato-ku, Tokyo (Directly connected to Toranomon Hills). No transfers.</li><li>Annual Salary Range: Determined flexibly based on experience and skills (upper ranges available).</li><li>Benefits: Book purchase support, "Gacha lunch" subsidy, babysitting support, diverse leave policies, etc.</li><li>Work Equipment: Company-provided PC/development environment customizable by engineers.</li></ul>Reference Number: 06940-0013266171By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuMTEyMTAuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-25T06:09:15Z

Sr. Software Engineer (Scala) - Full remote

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
Shape the Future of Digital Payments as a Senior Backend Engineer Are you ready to make a real impact on how millions of people shop online? Join a fast-growing Fintech innovator in Tokyo that's redefining the checkout experience. Here, your expertise will directly influence the evolution of digital payments-without the need for credit cards. If you're passionate about building robust systems and eager to see your work in action, this is your chance. What Makes This Opportunity Stand Out?<ul><li>Global, Inclusive Team: Collaborate with talented professionals from over 30 countries. Diversity isn't just a buzzword-it's the foundation of our creativity and success.</li><li>Flexible Workstyle: Choose where and when you work best. Whether you prefer a fully remote setup or the energy of our Tokyo office, you have full autonomy from day one.</li><li>Tech-Forward Environment: Tackle complex challenges using modern technologies like Rust and Scala, Kafka, and a microservices architecture. We encourage experimentation and continuous learning.</li><li>Growth & Ownership: Be involved in every stage of the software lifecycle, from concept to deployment. Your ideas matter and your leadership will help shape both products and the team.</li><li>Supportive Culture: We value open communication, knowledge sharing, and a healthy work-life balance. Enjoy complete flex time, weekends off, and a comprehensive benefits package-including retirement and pension plans.</li></ul>Your Role<ul><li>Lead and contribute to the design and development of scalable backend systems using Scala and other modern languages.</li><li>Drive projects from requirements gathering through to implementation, testing, and operation.</li><li>Collaborate with cross-functional teams to integrate with external APIs and financial products.</li><li>Mentor team members and help set technical direction.</li><li>Continuously improve system reliability, security, and performance.</li></ul>What We're Looking For<ul><li>Solid experience in backend development with languages such as Scala, Java, Kotlin, Rust or interest in Functional Programming</li><li>Proven ability to design new systems and enhance existing applications.</li><li>Strong communication skills in English; Japanese is a plus but not required.</li><li>Experience in Fintech or with functional programming is highly valued.</li><li>A proactive, collaborative mindset and a drive to make a difference.</li></ul>Salary<ul><li>8 million yen - 12 million yen</li></ul>Location<ul><li>Tokyo</li></ul>Reference number : 06940-0013257393By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S2hhbmcuTGUuNzMwNjkuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-09T01:41:11Z

Software Engineer

Tokyo,
remote
Permanent
8.0M - 8.0M JPY / Yearly
<h3 data-start="179" data-end="203">Job Responsibilities</h3><ul data-start="205" data-end="932"><li data-start="205" data-end="286">Collaborate with the development team to create innovative software solutions</li><li data-start="287" data-end="387">Participate in technical decision-making, including framework and programming language selection</li><li data-start="388" data-end="462">Share expertise on selected technologies and development architectures</li><li data-start="463" data-end="549">Provide support for product development and implement in-house technical solutions</li><li data-start="550" data-end="626">Develop and manage high-performance systems, databases, and applications</li><li data-start="627" data-end="688">Create high-level APIs and write clear, maintainable code</li><li data-start="689" data-end="756">Test software to ensure functionality, quality, and performance</li><li data-start="757" data-end="824">Troubleshoot, debug, and upgrade existing software as necessary</li><li data-start="825" data-end="882">Apply best practices for security and data protection</li><li data-start="883" data-end="932">Produce comprehensive technical documentation</li></ul><h3 data-start="934" data-end="961">Development Environment</h3>Languages: Java, Kotlin, JavaScript, TypeScript, Go, C#, etc. Frameworks: Spring, Vue.js, Nuxt.js, .NET Framework, etc. Infrastructure: AWS, GCP, AzureTeam Structure: Project teams typically consist of 5-8 members, including members from client development teams. Each team is supported by at least one highly skilled senior engineer to promote skill development through pair programming and other collaborative practices. This role emphasizes long-term development beyond simple coding tasks.<h3 data-start="1484" data-end="1508">Development Approach</h3>Our approach emphasizes agile development, moving away from the traditional waterfall methodologies commonly used in Japan's financial industry. Most projects begin at the upstream stage through direct contracts, allowing high flexibility in defining "what to build." You will work closely with the client's development team to discuss and decide on technology choices. Responsibilities cover the entire software development lifecycle, including requirements analysis, design, implementation, testing, deployment, and delivering the solution to users.<h3 data-start="2063" data-end="2090">Required Qualifications</h3><ul data-start="2092" data-end="2410"><li data-start="2092" data-end="2252">Experience with one or more of the following frameworks or languages:<ul data-start="2166" data-end="2252"><li data-start="2166" data-end="2191">Spring (Java or Kotlin)</li><li data-start="2194" data-end="2222">Vue.js, Nuxt.js, or Quasar</li><li data-start="2225" data-end="2229">Go</li><li data-start="2232" data-end="2252">C# .NET, ASP.NET</li></ul></li><li data-start="2253" data-end="2329">Minimum 3 years of experience in software engineering or a related field</li><li data-start="2330" data-end="2410">For non-Japanese nationals: Business-level Japanese proficiency (N2 or higher)</li></ul><h3 data-start="2412" data-end="2440">Preferred Qualifications</h3><ul data-start="2442" data-end="2685"><li data-start="2442" data-end="2513">Hands-on experience with cloud platforms such as AWS, GCP, or Azure</li><li data-start="2514" data-end="2579">Proven experience working in a collaborative team environment</li><li data-start="2580" data-end="2618">Conversational English proficiency</li><li data-start="2619" data-end="2685">Participation in product development from the conceptual stage</li></ul><h3 data-start="2687" data-end="2714">Ideal Candidate Profile</h3><ul data-start="2716" data-end="2786"><li data-start="2716" data-end="2786">Excellent communication skills and a strong commitment to teamwork</li></ul><h3 data-start="2788" data-end="2808">Example Projects</h3>Development of APIs for Financial Services Frontend: TypeScript / Angular / Ionic Backend: Go, Kotlin / Spring Authentication: OAuth 2.0 / OpenID Connect / FAPIIn-House Payment System Development for Retailers Backend: Go, Java Infrastructure: GCP, Kubernetes (GKE), microservicesDevelopment of Online-Only Financial Services for Major Institutions Frontend: TypeScript / Vue.js Backend: C# / .NET Core, ASP.NET Authentication: OAuth 2.0Modernization of Core Banking Systems Backend: Java / Kotlin Spring Infrastructure: Azure / GCP (multi-cloud) Reference Number: 06940-0013244624By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/c3VlLnRpbmcuNTA4NzUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-04T05:06:21Z

Android Engineer

Tokyo,
remote
Permanent
10.0M - 10.0M JPY / Yearly
Job Order: 06940-0013209966 Location: Tokyo (Remote-first, but relocation to Japan required) Salary: ¥10,000,000 annually<hr data-start="317" data-end="320" /><h3 data-start="322" data-end="357">Position: Android Engineer</h3>Join a growing team focused on building cross-border payment solutions used by high-profile global platforms. As the first Android Developer in this role, you'll play a key part in shaping mobile payment products, including a new POS app, SDK, and tap-to-pay functionality.<hr data-start="634" data-end="637" /><h3 data-start="639" data-end="668">Key Responsibilities:</h3><ul data-start="670" data-end="1130"><li data-start="670" data-end="761">Develop and maintain Android-based POS and Tap-to-Pay applications and SDK using Kotlin</li><li data-start="762" data-end="853">Collaborate with product managers and engineers to define and build new mobile features</li><li data-start="854" data-end="933">Partner with backend teams to ensure seamless mobile-to-server integrations</li><li data-start="934" data-end="1032">Participate in technical design reviews and contribute to the evolution of mobile architecture</li><li data-start="1033" data-end="1130">Contribute across the tech stack when needed (flexibility with languages/frameworks encouraged)</li></ul><hr data-start="1132" data-end="1135" /><h3 data-start="1137" data-end="1158">Requirements:</h3><ul data-start="1160" data-end="1554"><li data-start="1160" data-end="1233">3+ years of professional experience in mobile application development</li><li data-start="1234" data-end="1304">Proficiency with Android SDK and mobile development best practices</li><li data-start="1305" data-end="1369">Experience integrating RESTful APIs with mobile applications</li><li data-start="1370" data-end="1434">Strong understanding of UI/UX principles and design patterns</li><li data-start="1435" data-end="1512">T-shaped developer mindset - ability to contribute across technical areas</li><li data-start="1513" data-end="1554">Collaborative, team-oriented approach</li></ul><hr data-start="1556" data-end="1559" /><h3 data-start="1561" data-end="1586">Preferred Skills:</h3><ul data-start="1588" data-end="1794"><li data-start="1588" data-end="1636">Exposure to iOS development and architecture</li><li data-start="1637" data-end="1690">Familiarity with cross-platform mobile frameworks</li><li data-start="1691" data-end="1730">Business-level Japanese proficiency</li><li data-start="1731" data-end="1794">Previous experience working in or with Japanese organizations</li></ul><hr data-start="1796" data-end="1799" /><h3 data-start="1801" data-end="1818">Benefits:</h3><ul data-start="1820" data-end="2069"><li data-start="1820" data-end="1887">Remote-first work environment with Tokyo-based office available</li><li data-start="1888" data-end="1958">10 regular paid vacation days, plus 5 summer and 5 winter holidays</li><li data-start="1959" data-end="1979">Birthday holiday</li><li data-start="1980" data-end="2038">Self-learning budget to support continuous development</li><li data-start="2039" data-end="2069">Language training (Japanese)</li></ul>By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S29qaS5ZYWdpbnVtYS4xODY0Ni4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-09-03T05:53:14Z

iOS Engineer

Tokyo,
remote
Permanent
7.0M - 12.0M JPY / Yearly
<div class="--aL-612 "><div class="-Cg-644 " data-automation-id="questionContent"><div class="-Nr-646 "><div class="--ld-667"><div class="-Iv-698">Join a leading cross‑border payments team powering transactions for top global brands. Help us build a merchant‑facing iOS app from scratch, owning everything from onboarding flows and Tap‑to‑Pay to financial dashboards and reporting. What You'll Do <ul><li>Architect, develop, and maintain a best‑in‑class iOS application</li><li>Collaborate with PMs, designers, backend and Android engineers to define and ship features</li><li>Establish coding standards, review technical designs, and ensure cross‑platform consistency</li><li>Integrate RESTful APIs and uphold mobile UI/UX best practices</li></ul> What You Bring<ul><li>3+ years of solid iOS development with modern SDKs</li><li>Working knowledge of Android (Kotlin) to drive platform alignment</li><li>Strong understanding of mobile UI/UX principles and Apple's design guidelines</li><li>A T‑shaped mindset-comfortable diving into backend or product discussions</li><li>Team‑player attitude and clear communication skills</li></ul> Bonus Points <ul><li>Experience with React Native, Flutter, or other cross‑platform frameworks</li><li>Familiarity with Japanese business culture and intermediate Japanese language skills</li></ul> Perks & Benefits <ul><li>Remote‑first culture with Tokyo relocation support</li><li>Competitive salary plus performance bonus</li><li>Flexible hours, generous PTO, regular hackathons and meetups</li><li>Direct influence on product vision and growth</li></ul> Location : Tokyo Reference No.: 06940-0013264350</div></div></div></div></div><div class="--aL-612 "> </div>By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S29qaS5ZYWdpbnVtYS42MjM5OC4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-07-24T01:16:01Z

Full Stack Platform Engineer

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
Fullstack Platform Engineer Location: Tokyo (Remote First) Interested in rolling up your sleeves to build an engine behind an AI-powered cybersecurity platform? We're looking for a seasoned Fullstack Platform Engineer to help us process billions of security events in real time, weave in smart analytics, and create clear, data-rich interfaces that keep enterprises one step ahead of complex security threats. What You'll Do -Architect and implement scalable backend services and ETL pipelines (Kafka, ELK) in Rust, Go, Python, and TypeScript. -Collaborate with ML and security teams to embed AI-driven threat detection and optimize system performance for millions of users. -Build responsive front-end dashboards and tools using modern JavaScript frameworks. -Enforce robust security measures (OAuth 2.0, encryption) and compliance with industry standards. -Troubleshoot full-stack issues across cloud-native microservices, containers (Docker/K8s), and observability tools (Datadog, Vector). You Bring -Bachelors in CS or related, with 5+ years in fullstack development. -Proficiency in Rust and familiarity with Go, Python, Java, TypeScript. -Strong cloud, microservices, and database (SQL/NoSQL) experience. -A quick learner, excellent communicator, and a genuine passion for cybersecurity. Why Join Us? Enjoy a collaborative environment, fully remote work arrangements, and a dedicated learning budget for certifications and conferences. Help us push the boundaries of cybersecurity innovation! Salary: 8M - 12MReference Number: 06940-0013251295By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S29qaS5ZYWdpbnVtYS4wMzczMC4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-07-02T01:48:45Z

Software Engineer

Tokyo,
remote
Contract
10.8M - 10.8M JPY / Yearly
Client Profile Our client is mobility technology company focused on building software platforms and infrastructure for future transportation systems.Overview We are seeking a skilled Software Engineer to join the mobile development team. In this role, you will design, implement, and enhance mobile app features with a focus on performance, stability, and user experience. You will collaborate with cross-functional teams, contribute to clean and scalable architecture, and continuously improve our codebase and development processes.Key Responsibilities<ul><li>Develop and implement mobile app features and UI using Flutter</li><li>Collaborate closely with backend, UX, and other mobile engineers in cross-functional teams</li><li>Independently or jointly develop and deliver new features</li><li>Conduct unit testing and UI regression testing to ensure app quality</li><li>Debug and fix issues to maintain app stability</li><li>Monitor app performance and identify opportunities for improvements</li></ul>Requirements<ul><li>3+ years of mobile app development experience (Android or iOS) in a professional environment</li><li>Experience with native app development (Kotlin, Swift) or Flutter (Dart)</li><li>If no Flutter experience, proven ability to quickly learn new frameworks (e.g., ReactJS, SwiftUI, Jetpack Compose)</li><li>Strong knowledge of Clean Architecture and general software architecture practices</li><li>Hands-on experience with refactoring and improving codebases</li><li>Proactive, innovative mindset with a passion for improving products and processes</li><li>Willingness to learn new technologies and share knowledge with the team</li></ul>Hourly Salary5,200 JPYLocation Tokyo Reference Number: 06940-0013287776By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy" target="_blank">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/c2Fvcmkua29kYWthLjM2Nzc1LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2025-09-17T03:43:59Z

Software Engineer

Tokyo,
remote
Contract
11.9M - 11.9M JPY / Yearly
Ref No: 06940-0013287783 Location: Tokyo (Remote OK within Japan) Salary: ¥11,856,000<hr data-start="261" data-end="264" /><h3 data-start="266" data-end="297">What You'll Be Working On</h3>A social application with over 400,000 users (as of September 2024), focused on supporting a specific adult demographic. Built with modern AI technology and an intuitive UI/UX, the platform sees 1 match every 4 seconds and 1,000 new signups daily. It offers users a private and secure space to express concerns beyond their personal and professional environments.As a Full-Stack Web Developer, you will be responsible for designing, developing, and maintaining both new and existing features. You will collaborate with customer support and design teams to improve user experience. Strong skills in both frontend and backend development and familiarity with modern web technologies are required.<hr data-start="1016" data-end="1019" /><h3 data-start="1021" data-end="1043">Technology Stack</h3>Languages & Frameworks<ul data-start="1073" data-end="1296"><li data-start="1073" data-end="1116">TypeScript, JavaScript, Python, Node.js</li><li data-start="1117" data-end="1126">React</li><li data-start="1127" data-end="1139">DynamoDB</li><li data-start="1140" data-end="1165">Git (Version Control)</li><li data-start="1166" data-end="1197">GitHub (Project Management)</li><li data-start="1198" data-end="1223">Slack (Communication)</li><li data-start="1224" data-end="1296">Jest, Amplify, GraphQL, AWS (ALB, EC2, Cognito, Lambda, S3), SCSS, SQL</li></ul><hr data-start="1298" data-end="1301" /><h3 data-start="1303" data-end="1342">Development Environment & Culture</h3>Team & Organization<ul data-start="1370" data-end="1569"><li data-start="1370" data-end="1408">Team size: Fewer than 10 engineers</li><li data-start="1409" data-end="1457">Engineers participate in performance reviews</li><li data-start="1458" data-end="1507">Monthly career check-ins with managers or CTO</li><li data-start="1508" data-end="1569">Engineers earning ¥8M+ annually without management duties</li></ul>Technical Culture<ul data-start="1595" data-end="1750"><li data-start="1595" data-end="1646">Engineers involved in executive decision-making</li><li data-start="1647" data-end="1700">Engineering leadership with technical backgrounds</li><li data-start="1701" data-end="1750">English communication opportunities available</li></ul>Developer Autonomy<ul data-start="1777" data-end="2079"><li data-start="1777" data-end="1830">End-to-end responsibility: design, build, operate</li><li data-start="1831" data-end="1887">Engineers drive technical debt and tool improvements</li><li data-start="1888" data-end="1925">Freedom to choose OS, editor, IDE</li><li data-start="1926" data-end="1964">Engineers estimate their own tasks</li><li data-start="1965" data-end="2013">Iterative development with flexible schedule</li><li data-start="2014" data-end="2079">Tech stack kept up-to-date (within 1 year of latest versions)</li></ul>Quality Assurance<ul data-start="2105" data-end="2323"><li data-start="2105" data-end="2151">Mandatory code reviews or pair programming</li><li data-start="2152" data-end="2191">Shared coding standards across team</li><li data-start="2192" data-end="2229">Multi-environment quality testing</li><li data-start="2230" data-end="2264">Continuous deployment/delivery</li><li data-start="2265" data-end="2323">Pull request-based workflows with full version control</li></ul><hr data-start="2325" data-end="2328" /><h3 data-start="2330" data-end="2355">Scale & Performance</h3><ul data-start="2356" data-end="2465"><li data-start="2356" data-end="2388">Concurrent users: thousands+</li><li data-start="2389" data-end="2431">DB tables: tens of millions of records</li><li data-start="2432" data-end="2465">High traffic: thousands of RPS+</li></ul><hr data-start="2467" data-end="2470" /><h3 data-start="2472" data-end="2494">Work Environment</h3><ul data-start="2495" data-end="2668"><li data-start="2495" data-end="2528">Full remote work within Japan</li><li data-start="2529" data-end="2553">Mid-day break system</li><li data-start="2554" data-end="2626">Family-friendly: team includes engineers with preschool-age children</li><li data-start="2627" data-end="2668">Flextime or discretionary work system</li></ul><hr data-start="2670" data-end="2673" /><h3 data-start="2675" data-end="2699">Benefits & Support</h3><ul data-start="2700" data-end="2845"><li data-start="2700" data-end="2765">Conference participation supported (tickets + business trips)</li><li data-start="2766" data-end="2809">Preferred-spec PC and displays provided</li><li data-start="2810" data-end="2845">Open to new graduate developers</li></ul><hr data-start="2847" data-end="2850" /><h3 data-start="2852" data-end="2877">Required Experience</h3>Must-Have<ul data-start="2895" data-end="3055"><li data-start="2895" data-end="2923">Performance optimization</li><li data-start="2924" data-end="2950">Remote work experience</li><li data-start="2951" data-end="2989">Feature enhancements and additions</li><li data-start="2990" data-end="3027">Release and deployment operations</li><li data-start="3028" data-end="3055">New feature development</li></ul>Nice-to-Have<ul data-start="3076" data-end="3231"><li data-start="3076" data-end="3112">Bug identification and reporting</li><li data-start="3113" data-end="3139">Refactoring experience</li><li data-start="3140" data-end="3187">Experience with large-scale traffic systems</li><li data-start="3188" data-end="3231">Load balancing and scalability planning</li></ul>By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/c2Fvcmkua29kYWthLjEwOTQ5LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2025-09-19T01:57:24Z

Tech Lead - Data Platform

Tokyo,
remote
Permanent
9.0M - 12.0M JPY / Yearly
Company Profile<ul><li>Our client provides an integrated digital platform centered around power services.</li></ul>The Role<ul><li>Based on your experience, you will be responsible for leading the following operations:</li></ul>Data Infrastructure Development & Operations<ul><li>Designing, operating, and optimizing data lake/pipeline in an AWS × Databricks environment.</li><li>Operating and optimizing performance of ETL/ELT using tools like Fivetran.</li><li>Designing databases and tuning structures based on business requirements.</li></ul>Enhancing Operational Stability and Reliability<ul><li>Performance improvements for various databases and automating data quality management (quality checks, alert design, etc.).</li><li>Collaborating with the Data Governance Team to improve reliability.</li></ul>CI/CD and Operational Automation<ul><li>Automating CI/CD workflows and pipelines.</li><li>Designing and implementing data engineering standards.</li></ul>Solving Technical Issues & Knowledge Sharing<ul><li>Analyzing and resolving technical issues in the data infrastructure.</li><li>Mentoring young engineers and sharing best practices.</li></ul>Applicable Technology Stack<ul><li>Cloud: AWS (general), Databricks, Fivetran, Workato.</li><li>Languages: Python, SQL.</li><li>Databases: MySQL, PostgreSQL, NoSQL databases.</li><li>Visualization: Tableau.</li><li>Monitoring: Datadog, PagerDuty.</li><li>Others: Slack, Backlog, TreasureData, Salesforce, ChatGPT Teams, GitHub Copilot.</li></ul>Your Skills Required Experience & Skills:<ul><li>10+ years of professional experience as a Data Engineer, or Infrastructure/DB/Backend Engineer.</li><li>Experience in building and operating data stores and data integration systems on AWS.</li><li>SaaS utilization for data processing/data lake operations.</li><li>Proven track record in database tuning and performance improvement.</li><li>Strong communication skills to conduct business in Japanese.</li><li>Knowledge equivalent to AWS Solutions Architect - Professional certification.</li></ul>Preferred Skills:<ul><li>Databricks-related certifications or cloud qualifications.</li><li>Experience with data governance/quality management tools (e.g., Great Expectations, Apache Atlas).</li><li>CDMP certification.</li><li>Development experience in web/mobile applications (using Python or JavaScript).</li><li>Ability to read and write technical documentation in English</li></ul>Career Path You can develop a diverse career, including:<ul><li>Leading company-wide data strategies as a Data Architect.</li><li>Becoming a professional specializing in operations and maintenance.</li><li>Transitioning to mentoring young professionals or team management.</li><li>Flexible and tailored career support based on your aspirations and strengths.</li></ul>Location TokyoSalary9 - 12 million yenWorking Environment<ul><li>Working hours: 9:00 - 18:00 (Flextime available).</li><li>Holidays: Full two-day weekends (Saturday and Sunday), public holidays, over 124 annual holidays.</li><li>Benefits: Childcare support, club activities, company events, stock option plans, employee discount on electricity bills, etc.</li><li>Skill Development Support: Tech blog publishing, study sessions, external training subsidies, and company power plant visit tours.</li></ul> Reference Number: 06940-0013260038By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuMDcxODMuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-16T07:08:40Z

QA Engineer (Automation)

Tokyo 23 wards,
remote
Permanent
10.0M - 10.0M JPY / Yearly
Overview We are seeking a QA Engineer to lead quality assurance across multiple products. This role involves ensuring product reliability, driving test automation, and leveraging technology such as AI to enhance testing efficiency and product value.Responsibilities<ul data-start="479" data-end="1122"><li data-start="479" data-end="567">Participate in requirements and design reviews to identify and mitigate risks early.</li><li data-start="568" data-end="656">Plan and execute QA activities for new features (EPICs/PBIs) and regression testing.</li><li data-start="657" data-end="740">Develop and operate test automation scripts and integrate with CI/CD pipelines.</li><li data-start="741" data-end="818">Analyze customer feedback and usage data to propose quality improvements.</li><li data-start="819" data-end="908">Monitor test progress, review deliverables, and lead continuous process improvements.</li><li data-start="909" data-end="969">Collaborate across teams to implement QA best practices.</li><li data-start="970" data-end="1122">(Future) Drive quality strategy at the product level, lead AI-powered testing initiatives, and design automation frameworks at the department level.</li></ul>Qualifications Required<ul data-start="1158" data-end="1265"><li data-start="1158" data-end="1196">3+ years QA engineering experience</li><li data-start="1197" data-end="1236">Hands-on test automation experience</li><li data-start="1237" data-end="1265">Agile testing background</li></ul>Preferred<ul data-start="1281" data-end="1457"><li data-start="1281" data-end="1332">3+ years SaaS development (frontend or backend)</li><li data-start="1333" data-end="1378">Experience with modeling and QCD concepts</li><li data-start="1379" data-end="1457">Knowledge of testing frameworks, CI/CD tools, and various QA methodologies</li></ul>Tech Stack<ul data-start="1476" data-end="1696"><li data-start="1476" data-end="1525">Languages: TypeScript, JavaScript, Python, C#</li><li data-start="1526" data-end="1552">Automation: Playwright</li><li data-start="1553" data-end="1624">Infrastructure: GCP, Azure, Google Workspace, Microsoft 365, Notion</li><li data-start="1625" data-end="1652">Version Control: GitHub</li><li data-start="1653" data-end="1696">Collaboration: Slack, Zoom, Google Meet</li></ul>Position Features<ul data-start="1722" data-end="1917"><li data-start="1722" data-end="1786">Involvement from early development stages to product release</li><li data-start="1787" data-end="1850">Exposure to AI-driven testing and cutting-edge QA practices</li><li data-start="1851" data-end="1917">Growth opportunities as a generalist across development and QA</li></ul> Reference No: 06940-0013222086By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/c3VlLnRpbmcuMTYzNDUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-08-29T01:07:03Z

SDET(Software Development Engineer in Test)

Fukuoka,
remote
Permanent
6.5M - 10.0M JPY / Yearly
SDET (Software Development Engineer in Test) - Cashless Business Platform (Fukuoka / Hybrid) Only applicants currently residing in Japan with valid working visas will be considered. We are hiring a Software Development Engineer in Test (SDET) to support the quality and reliability of a growing cashless payment platform for businesses. This product enables companies to streamline expense management using real and virtual business cards, supporting operational efficiency and digitization. This role is based at our Fukuoka development center, which plays a central role in service expansion. Candidates must be willing to work onsite multiple days per week under our hybrid work model. We are also offering a UI-turn relocation support program, including a relocation allowance of up to ¥500,000 for eligible engineers moving to Fukuoka (conditions apply). Key Responsibilities:<ul><li>Design and implement automated test scripts for both functional and non-functional testing</li><li>Execute API tests using real environments (no mock)</li><li>Build and maintain test pipelines within CI/CD</li><li>Plan and refine test strategies aligned with product goals</li><li>Review code and test cases, covering edge scenarios</li></ul>Minimum Requirements:<ul><li>3+ years of experience in either software development or automated testing with scripting languages</li><li>Interest in quality assurance and test automation</li><li>Conversational Japanese (N3 level or equivalent; tools allowed for internal communication)</li><li>Business-level English (TOEIC 700+ or equivalent); capable of participating in English meetings and documentation from day one</li></ul>Preferred:<ul><li>Degree or equivalent knowledge in computer science or information engineering</li><li>Experience writing high-precision test specifications</li><li>Familiarity with AI development or AI tools used to improve engineering workflows</li></ul>Tech Stack:<ul><li>Backend: Ruby on Rails</li><li>Frontend: Next.js, Redux, TypeScript, Apollo Client, Jest</li><li>Database: MySQL (Aurora)</li><li>Infrastructure: AWS, Docker, nginx, Redis, Terraform</li><li>CI/CD: CircleCI, GitHub Actions</li><li>Monitoring: DataDog, Rollbar</li><li>Communication: Slack / Jira</li></ul>Workstyle & Benefits:<ul><li>Hybrid work model (minimum 2 office days/week required)</li><li>Working hours: 9:30-18:30 (flexible under discretionary labor system)</li><li>Relocation support for UI-turn to Fukuoka</li><li>Support for devices, books, and conference participation</li><li>Comprehensive benefits: insurance, stock plan, pension, housing assistance, and more</li></ul>Ref No.: 06940-0013264320By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuMjI0NzAuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-18T03:38:57Z

Senior iOS developer

Tokyo,
remote
Permanent
1.2M - 1.2M JPY / Yearly
Salary: ¥1,200,000 Location: Tokyo JO:06940-0013209960Job Description:<ul data-start="283" data-end="673"><li data-start="283" data-end="346">Develop and maintain iOS apps for consumer-facing services.</li><li data-start="347" data-end="425">Implement new features and optimize existing ones based on business needs.</li><li data-start="426" data-end="482">Manage app submissions and updates to the App Store.</li><li data-start="483" data-end="563">Ensure stable operation through performance monitoring and issue resolution.</li><li data-start="564" data-end="619">Continuously improve code quality and architecture.</li><li data-start="620" data-end="673">Keep up with new tech trends and framework updates.</li></ul>By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/VmljdG9yaWFSeW8uNjU5NjIuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-09-04T01:29:08Z

AEM Developer - Digital Experience Transformation

Tokyo,
remote
Permanent
8.0M - 13.0M JPY / Yearly
Why This Role Stands Out<ul><li>Global Collaboration: Join a team where Tokyo-based experts work hand-in-hand with talented colleagues across India, Europe, and beyond. You'll gain exposure to international best practices and broaden your professional network.</li><li>Impactful Projects: Play a key role in designing and delivering advanced content management solutions that drive business growth and customer loyalty for top-tier clients.</li><li>Flexible Workstyle: Enjoy the balance of remote work and occasional in-person collaboration at a modern office in central Tokyo. A flex system support your productivity and life outside work.</li><li>Growth & Learning: Take on challenges that stretch your technical and creative skills, with opportunities to innovate and lead. Access to continuous learning, global knowledge-sharing, and career advancement is built into the culture.</li><li>Comprehensive Benefits: From robust health and social insurance to unique perks like access to sports clubs, wellness retreats, and a flexible cafeteria plan, your well-being is a priority.</li></ul>What You'll Do<ul><li>Architect and develop robust AEM-based CMS applications, leveraging both headless and traditional approaches.</li><li>Translate business needs into actionable technical strategies and deliverables.</li><li>Create and implement custom components, templates, and workflows using AEM, HTL, and Sling models.</li><li>Integrate AEM solutions with backend RESTful services to deliver seamless digital experiences.</li><li>Collaborate closely with technical leads, business analysts, QA, and global team members to ensure timely, high-quality releases.</li><li>Drive innovation by proposing and implementing new ideas for enhancing customer experience and system performance.</li></ul>What You Bring<ul><li>At least 5 years of hands-on application development experience, with a minimum of 3 years specializing in AEM (both frontend and backend).</li><li>Proficiency with HTL, AEM workflows, custom component creation, Sling models, and integration with RESTful APIs.</li><li>Strong command of Java for web development, including unit testing (JUnit) and code management best practices.</li><li>Experience in a bilingual (Japanese/English) environment, with business-level proficiency in both languages.</li><li>Bonus points for knowledge of AEM as a cloud service, content as a service, design patterns, caching strategies, or eCommerce platforms.</li><li>Experience collaborating with international teams is highly valued.</li></ul>Work Environment & Benefits<ul><li>Hybrid work model: Main office in Minato-ku, Tokyo, with remote work as the standard.</li><li>Flexible working hours and a results-driven culture.</li><li>Full suite of social insurances, retirement savings options, and access to exclusive wellness and leisure facilities.</li><li>Generous paid leave, including annual, public holiday, and special leave programs.</li></ul>Salary<ul><li>8 million yen - 13 million yen</li></ul>Location<ul><li>Tokyo</li></ul>Reference number : 06940-0013255668 By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S2hhbmcuTGUuMjg4MDUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-03T06:09:43Z

Senior Software Engineer (Open to Any Language)

Tokyo,
remote
Permanent
8.0M - 15.0M JPY / Yearly
Senior Software Engineer (All Languages Welcome: Python, Java, Go, etc.) Drive critical projects and solve complex technical challenges at scale. We care more about your architectural thinking, problem-solving skills, and real-world experience than any single programming language. If you're a senior engineer ready to work with a diverse team and open to learning new tools, let's talk! 🌟 WHY THIS OPPORTUNITY IS EXCEPTIONAL Pioneer next-generation financial systems - from core banking modernization to cashless payment platforms that impact millions of users daily Work with bleeding-edge tech stack including cloud-native solutions, mobile technologies, and generative AI integration in financial services Shape products from concept to production - join projects at the proof-of-concept stage and influence architectural decisions from day one Agile development in traditional finance - break industry norms by implementing modern development practices in Japan's conservative financial sector Small, high-impact teams (5-8 members) with dedicated senior engineers providing mentorship and pair programming opportunities Direct client collaboration on requirements definition and system design, not just implementation work 💻 WHAT YOU'LL BUILD Design and implement API-first financial solutions for third-party integrations using OAuth 2.0/OpenID Connect/FAPI standards Develop microservices architectures on GCP/AWS/Azure for scalable payment processing systems Create modern web applications using TypeScript, Vue.js, and mobile-first approaches with Ionic Build core banking system modernization projects using Java/Kotlin Spring and multi-cloud infrastructure Implement security-first development practices for financial-grade data protection Write comprehensive technical documentation and knowledge transfer to global team members 👩‍💻 WHO WE'RE SEEKING Essential Experience: 7+ years as a software engineer with proven track record in production systems Hands-on expertise in one or more: Java, Go, Kotlin, C#, Javascript, Typescript, Python etc. Cloud platform experience with AWS, GCP, or Azure Team development experience with version control and collaborative workflows Conversational English for international team communication Experience building products from conception stage through full development lifecycle 🎯 WHAT'S IN IT FOR YOU Accelerated career growth through diverse project exposure across multiple technology stacks High social impact work improving Japan's financial infrastructure and promoting cashless society adoption Multicultural engineering environment with global perspectives and cross-cultural collaboration skills End-to-end ownership from architecture design through deployment and user delivery Technology exploration opportunities to expand beyond your current programming language expertise Mentorship from senior engineers in small team settings with personalized skill developmentReference No. : 06940-0013273964By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/c3VlLnRpbmcuMzUxMTguMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-08-05T06:45:19Z

Senior Linux Internals Engineer

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
A global cybersecurity leader is seeking a Senior Linux Internals Engineer to join their endpoint team in Tokyo. In this role, you'll design and develop Linux kernel-level components and system features that power next-generation threat detection. You'll work closely with security experts, backend developers, and product managers to deliver secure, scalable, and high-performance solutions. Key Responsibilities<ul><li>Design and optimize Linux kernel and system-level components for endpoint detection and response.</li><li>Conduct low-level debugging, performance profiling, and kernel-mode optimizations.</li><li>Collaborate with cross-functional teams to ensure secure, reliable delivery.</li><li>Review code and mentor engineers on Linux and C++ best practices.</li><li>Contribute to technical strategy and stay current with Linux kernel developments.</li></ul> Qualifications<ul><li>5+ years in Linux systems programming with deep knowledge of kernel internals.</li><li>Expert-level C++ (11/14/17) and modern system-level programming.</li><li>Proficiency with debugging/profiling tools (GDB, perf, ftrace, strace, auditd).</li><li>Familiarity with Git, Make, CMake.</li><li>Preferred: eBPF, scripting (Python/Bash), containerization (Docker/Kubernetes), cybersecurity background, leadership in remote/distributed teams.</li></ul> What's Offered<ul><li>Flexible hours with remote work options.</li><li>Strong focus on professional growth and continuous learning.</li><li>Collaborative and innovative team culture.</li></ul> Unique Highlights A rare opportunity to work at the intersection of Linux kernel engineering and cybersecurity, shaping technology with direct global impact. The company champions a culture of teamwork, resilience, inclusion, and bold innovation.Salary 8M - 12M JPYLocation Tokyo Reference Number: 06940-0013289584By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S29qaS5ZYWdpbnVtYS4zMDkxNC4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-09-02T04:57:51Z

Scala Engineer

Tokyo,
remote
Permanent
7.0M - 10.0M JPY / Yearly
🗾 Tokyo, Japan | 🏠 Full Remote | ⚡ Functional Programming Excellence 💰 Transform Digital Payments with Functional Programming Join our dynamic engineering team building next-generation payment gateway solutions that power thousands of merchants across Japan's diverse payment ecosystem. Our proprietary platform seamlessly integrates credit card processing with QR payment systems and bank transfers, creating unified experiences for businesses of all sizes. ✨ What Sets This Role Apart 🎯 Engineering Excellence & Autonomy Lead technical decisions in a flat organization where your voice shapes product direction Work with production systems processing real transactions at scale Collaborate in high-performing teams without corporate bureaucracy Direct access to leadership for proposing improvements and driving initiatives 📈 Career Growth & Impact Expand functional programming expertise with industry-leading mentorship Take ownership of entire system components from conception to deployment Contribute to architectural decisions for large-scale distributed systems Work across diverse technical challenges beyond traditional API development ⚖️ Work-Life Integration Complete location flexibility with full remote capabilities Flexible scheduling respecting your optimal productivity hours Strong retention culture - many engineers return for the autonomy and impact 🛠️ Core Responsibilities 🏗️ Design resilient, scalable backend services for cloud-native payment processing 🔗 Implement robust API systems serving high-volume transaction flows 👥 Participate in code reviews and mentor team members 🔄 Drive continuous improvement initiatives across development workflows 🤝 Collaborate with cross-functional teams to deliver integrated solutions ✅ Required Qualifications 💻 Technical Foundation 3+ years of object-oriented programming experience 1+ years of functional programming experience (Scala, Java, Kotlin preferred) Strong API development and web service architecture background Proficiency with relational database systems and query optimization Experience with Git-based version control and collaborative development Proven track record developing comprehensive automated test suites Computer Science degree or equivalent technical background 🌟 Valuable Additional Skills 📡 Event-driven architecture and messaging system implementation 🗄️ NoSQL database design and AWS cloud services experience 🔧 Microservices design patterns and CI/CD pipeline development 💼 Financial services domain knowledge 🌐 Open source contribution history 🗣️ Conversational Japanese ability for enhanced team collaboration 🎯 Why Choose Us 🚀 Technical Innovation Work on systems processing real financial transactions at scale Contribute to entirely in-house developed technology stack Influence architectural decisions impacting thousands of merchants Access cutting-edge functional programming practices 🌱 Professional Growth Transition from larger corporate environments to high-impact startup culture Direct involvement in feature planning and business strategy discussions Exposure to complete product development lifecycle Join a community of developers who specifically returned for our collaborative environmentRef No.: 06940-0013260806 By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S2hhbmcuTGUuMjg2NTguMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-15T06:42:14Z

Software Engineer (Experienced) - Python, Java, PHP

Tokyo,
remote
Permanent
8.0M - 10.0M JPY / Yearly
Position Overview Depending on your experience, you will be involved in a range of responsibilities, including: <ul><li>New development and feature enhancement of core systems (e.g., contract, billing, and payment management) </li><li>Design and development of new web services and APIs, including UI/UX improvements </li><li>Backend API development and modification for mobile applications </li><li>System planning for new business initiatives, requirement analysis, and QCD management </li><li>Full-cycle involvement from system and infrastructure design through development, testing, and operations/maintenance </li><li>Working in a hybrid internal/external development team structure, selecting the best technologies and team composition per project. You'll also participate in deciding tech stacks and architecture. </li></ul><hr /><h4>Work Environment</h4><ul><li>Team Size: Approx. 30 members </li><li>Technologies: AWS (ECS, Lambda, etc.), Docker, Laravel, Spring, Flutter, Terraform, Datadog </li><li>Working Hours: 9:00-18:00 (flexible hours available); some overtime </li><li>Work Style: 5-day workweek (weekends and national holidays off); 124 annual holidays; childcare and caregiving support systems available </li><li>Location: Office near Ueno Station (Tokyo) </li></ul><hr /><h4>What We're Looking For</h4><ul><li>5+ years of experience in web system and API development (using PHP or Java) </li><li>Experience developing in cloud environments </li><li>Skills in designing with performance and scalability in mind </li><li>Proactive problem-solver with a hands-on attitude toward improvement in team development </li><li>Curiosity and enthusiasm for learning new technologies </li></ul>Preferred qualifications include: <ul><li>Knowledge of AWS </li><li>Experience leading small teams </li><li>Experience setting up CI/CD pipelines </li><li>Background in energy-related system development </li></ul><hr /><h4>Career Paths</h4>You'll have the opportunity to grow not only as a technical expert but also in roles such as project management, system planning, or people management. Many of our current managers started as engineers, and we offer an environment where you can grow on both technical and business fronts. <hr />Annual Salary: ¥8,000,000 - ¥10,000,000 Reference Number: 06940-0013260037 By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/U2hpbWFtdXJhLlNoaW5vYnUuMjIyMTYuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-08-25T08:35:15Z

Software Engineer

Tokyo,
remote
Contract
10.0M - 10.0M JPY / Yearly
Software Engineer - Data PlatformAbout the Role We are seeking a software engineer to join the data platform team. In this role, you will design, develop, and maintain critical systems that enable our data ingestion and processing pipelines. You will leverage modern cloud-based technologies to ensure that our data infrastructure remains secure, efficient, and highly reliable.Key Responsibilities<ul><li>Develop and maintain robust data ingestion pipelines capable of processing large-scale datasets.</li><li>Collaborate closely with the Security and Privacy teams to ensure compliance with relevant standards and regulations.</li><li>Conduct integration, end-to-end, and load testing to identify and resolve issues in data pipelines.</li><li>Use observability tools to monitor production systems, setting up alerts and tracking their performance effectively.</li><li>Troubleshoot and resolve bugs and performance bottlenecks within data processing systems.</li></ul>What We're Looking For<ul><li>Proficiency in programming with Kotlin or Java.</li><li>Experience with cloud technologies (e.g., AWS), microservices, and event-driven distributed system architectures.</li><li>Strong database expertise, including SQL, relational databases, and NoSQL solutions.</li><li>Familiarity with data streaming tools such as AWS Kinesis, Kafka, Flink, or Spark.</li><li>Hands-on experience with Snowflake for data warehousing.</li><li>A solid understanding of monitoring, troubleshooting, and performance optimization for production systems.</li></ul> Reference No.: 06940-0013272616By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy" target="_blank">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/V2lsbC5GaXRjaC41NDcxNC4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-09-05T04:37:49Z

Site Reliability Engineer (SRE) - Manufacturing AI Platform

Tokyo,
remote
Permanent
8.0M - 11.0M JPY / Yearly
Tokyo, Japan | Remote-First | High-Impact Engineering Build the Future of Manufacturing Technology Join a fast-growing SaaS platform revolutionizing global manufacturing through cutting-edge AI and 3D CAD technology. We're transforming traditional procurement with innovative algorithms that optimize quality, cost, and delivery time across international supply chains. Our rapidly expanding platform serves major manufacturers worldwide, requiring rock-solid reliability as we scale from startup to industry leader. What Makes This Role Exceptional "High-Impact Engineering" Build scalable systems from scratch in a fast-paced startup environment within a 600+ person company Lead reliability initiatives for mission-critical manufacturing platforms processing real transactions Work directly with CTO and engineering leadership in a flat organizational structure Drive technical decisions that directly impact global manufacturing efficiency "Career Acceleration & Global Impact" Rapid career progression in flat organization with system-level project ownership Establish SRE practices and culture from the ground up Work with multinational teams from 15+ countries in English and Japanese Technical meetings conducted bilingually to support international collaboration "Core Responsibilities" Design Google Cloud-based architectures for manufacturing-scale workloads Build robust monitoring and observability systems using Datadog and modern tooling Establish SLI/SLO frameworks and lead incident response procedures Implement Infrastructure-as-Code using Terraform and Kubernetes Optimize CI/CD pipelines with GitHub Actions and ArgoCD Collaborate on microservices architecture using Rust, TypeScript, and Node.js Required Qualifications "Technical Foundation" 7+ years hands-on software development experience Proven SRE team experience or equivalent infrastructure reliability roles Expert-level cloud architecture design and operations (Google Cloud preferred) Production experience with Kubernetes and container orchestration Strong Infrastructure-as-Code practices and CI/CD pipeline development Web application development and production operations background Business-level Japanese communication skills "Valuable Additional Skills" Business-level English proficiency for international collaboration Distributed systems architecture and operations experience Backend development experience with statically-typed languages Advanced monitoring platform experience (Datadog, Prometheus, etc.) Experience building SRE culture within growing organizations SRE leadership experience in 50+ engineer organizations Why Choose Us "Technical Innovation" Work with cutting-edge manufacturing AI and 3D CAD processing technology Contribute to systems handling real manufacturing transactions at global scale Access modern tech stack including Rust, TypeScript, and advanced ML infrastructure Architect solutions for one of Japan's most innovative manufacturing companies"Professional Growth" Establish SRE practices in rapidly growing technology company Lead reliability initiatives for mission-critical manufacturing systems International exposure working with global manufacturing networks Family-friendly policies with 50% of employees being parents Salary: 8M-11MLocation: TokyoReference Number: 06940-0013260805By clicking 'apply', you give your express consent that Robert Half may use your personal information to process your job application and to contact you from time to time for future employment opportunities. For further information on how Robert Half processes your personal information and how to access and correct your information, please read the Robert Half privacy notice <a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>. Please do not submit any sensitive personal data to us in your resume (such as such as race, beliefs, social status, medical history or criminal record) as we do not collect your sensitive personal data at this time.<hr />お客様が「今すぐ応募」ボタンをクリックすることにより、ロバート・ハーフ（以下、当社）がお客様の応募内容を処理し、求人情報を今後随時ご連絡する目的で個人情報を使用することに明示的に同意ただいたこととなります。当社による個人情報の処理方法、またお客様自身の個人情報へのアクセスおよびその訂正に関する詳細については、プライバシー規約（<a href="https://www.roberthalf.com/jp/ja/privacy">https://www.roberthalf.com/jp/ja/privacy</a>）をお読みください。当社は、要配慮個人情報はお預かりしておりませんので人種、信条、社会的身分、病歴、犯罪の経歴など、取扱いに特に配慮を要する個人情報は、ご提出いただく職務経歴書・レジュメ等に含めないようお願いいたします。<img src="https://counter.adcourier.com/S2hhbmcuTGUuMzkzMDEuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-15T07:04:40Z