28 results for Full Stack Engineer in Japan

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

Senior Platform Engineer

Tokyo,
remote
Permanent
9.0M - 12.0M JPY / Yearly
Selling points<ul><li>Drive innovation: The Product, Platform & Engineering team designs, builds, and manages our core platforms.</li><li>Global collaboration: Work with top engineering teams from around the world in a diverse and highly skilled team.</li><li>Cross-functional teamwork: Collaborate with sales, product, engineering, and operations to build, test, launch, and improve data products.</li><li>Growth potential: As the team expands, you'll have the chance to step up as a team leader.</li></ul>Company Profile<ul><li>My client is a leader in digital media and performance marketing, specializing in personalized advertising and promotions for consumer-packaged goods brands, retailers, and agencies. They help stores and brands learn what shoppers like by looking at what people buy.</li></ul>The Role<ul><li>In this role, you'll enjoy the challenge of improving platforms for apps, data, and AI, helping shape the technology that drives our business forward in Japan. You'll design cloud solutions, lead DevOps and DataOps teams, and make sure our platforms are reliable, scalable, and always getting better. You'll collaborate with various teams to solve complex challenges exploring and experimenting with new ideas. Whether troubleshooting, automating tests, setting standards, or guiding teams, your work directly shapes how our products grow and please customers.</li></ul>Your Skills<ul><li>If you're passionate about building great software that helps businesses grow, this could be your ideal next step. We're looking for someone with over six years of hands-on experience with cloud platforms (Microsoft Azure is a must) along with DevOps, Java, Kubernetes, and both SQL and NoSQL databases. You should be comfortable working across the entire tech stack and have experience with big data, microservices, APIs and automated testing as well as collaborating in Agile environments across global teams.</li></ul>Salary<ul><li>9,000,000 yen - 12,000,000 yen</li></ul>Location<ul><li>Tokyo</li></ul>Reference number: 06940-0013238708By 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/S29qaS5ZYWdpbnVtYS41ODcxMS4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-06-05T06:22:35Z

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

Platform Engineer

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
Company Profile<ul><li>Our client is looking for a Cloud infrastructure and platform engineer for thier cloud system.</li></ul>The Role<ul><li>This role will be responsible for the engineering of Cloud Infrastructure Platforms to provide robust, reliable and cost-efficient Platform so that we can deliver the best experience for our growing customers base.</li><li>Main Responsibilities Architect and build a robust, scalable and stable infrastructure</li><li>Architect and build Infrastructure that is easily maintainable during patching and upgrades</li><li>Architect and build Infrastructure with AWS regional level failure tolerance</li><li>Work together with our Security Engineers to provision a secure Infrastructure Automations for AWS Deployments to ensure fast delivery of Cloud Services to our developers</li><li>Provide through Automations means for developers to easily deploy resources on AWS.</li><li>Design and Build Reliable Infrastructure: Create systems that are strong, stable, and can grow as needed.</li><li>Easy Maintenance: Make sure the infrastructure is simple to update and patch without causing problems.</li><li>High Availability: Build systems that can keep running even if there are failures in an entire AWS region.</li><li>Automation for Fast Delivery: Automate AWS deployments so developers can quickly access the cloud services they need.</li><li>Developer-Friendly Tools: Provide automated solutions so developers can easily set up and manage AWS resources.</li></ul>Your Skills <ul><li>More than 5 years of technical experience in Cloud based Infrastructure Platform</li><li>Ability to demonstrate high degree of ownership in a Production environment</li><li>Good understanding of Cloud security best practices and payment industry compliance standards</li><li>Expertise in designing, building and troubleshooting large-scale streaming and distributed systems using Kafka.</li><li>Expertise in building Robust platforms based on NoSQL/KVS datastores like DynamoDB, Opensearch/ Elasticsearch and Redis.</li><li>Experience in Cloud infrastructure and platform systems availability, performance and cost management Extensive technical hands-on experience of Computing, Storage and Analytical Services on Cloud(AWS)</li><li>Experience with IAC tools in AWS such as Terraform, CloudFormation, CDK Experience with Cloud Services Monitoring, Detection and Response Experience in Cloud Services Performance Tuning, cost controls and management Experience in Cloud Infrastructure Service patching and upgrades PayPay DevOps emphasize automation.</li><li>Demonstrated skill with the following are required: Python ShellScripting Go/ Rust (optional) Have excellent oral, written, verbal and interpersonal communication skills. Preferred Qualifications Bachelor's degree and above in a technology related field Experience with other cloud service providers (e.g GCP, Azure)</li><li>Experience with Kubernetes (CKA, CKAD or CKS)</li><li>Experience with Event-Driven Architecture (Kafka preferred)</li><li>Experience using and contributing to Open Source tools</li><li>Experience in managing IT compliance and security risk Published papers / blogs / articles - Relevant and verifiable certifications</li><li>Bilingual in English and Japanese is nice to have, but not required. Proficiency in either language is fine. </li></ul>Tech Stack<ul><li>AWS: VPC, EC2, ECS, EKS, Lambda, Cloudfront, MWAA, RDS, ElastiCache, DynamoDB, Opensearch, S3, CloudWatch, Cognito, SQS, KMS, Secret Manager, KMS, MSK, CodeCommit, CodeBuild, CodeDeploy, CodePipeline, CloudFormation and other services Terraform, Github Actions, Prometheus, Grafana, Dynatrace, Atlantis, ArgoCD, OpenTelemetry</li></ul>Location TokyoSalary8 - 12 million yen Reference Number: 06940-0013244587By 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/V2F0dW55dS5TaXJpcGFpcm9qLjgzNTM1LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2025-06-17T02:32:29Z

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 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

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

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

Front End Engineer

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
What Sets This Opportunity Apart Mission with Real Impact: Help transform financial services by making cashless payments more accessible and intuitive for everyone in Japan. Your work will drive a fundamental shift in how people interact with money. Freedom to Innovate: Join a culture that rewards initiative, creative problem-solving, and the courage to challenge the status quo. Here, you'll help rebuild core systems from the ground up, not just tweak existing features. Career Growth & Ownership: Take on enterprise-scale challenges, lead architectural decisions, and see your ideas move from concept to reality. You'll have a direct hand in expanding the company's service portfolio as it aims to become Japan's go-to fintech platform. Flexible Workstyle: Enjoy true flexibility-work fully remotely from anywhere in Japan, with occasional team gatherings in Tokyo. There's no fixed office attendance, and you set your own hours for optimal work-life balance. Collaborative & Diverse Team: Work alongside passionate engineers, product managers, and designers from around the world. Communication is open, and your input will always be valued. What You'll Do Collaborate across disciplines to deliver new features and elevate the user experience for a rapidly growing digital payments platform. Redesign and enhance frontend architecture for scalability, maintainability, and future growth. Tackle complex technical challenges as you help reimagine a system at the heart of Japan's fintech transformation. Mentor peers, share knowledge, and uphold engineering best practices through code reviews and feedback. Troubleshoot and resolve issues to ensure a secure, robust, and seamless product. Who Thrives Here Engineers with 5+ years of hands-on experience in JavaScript and/or TypeScript, and at least 2 years working with Vue.js (React also welcome). Professionals who've led frontend projects and designed scalable architectures. Those who prefer building products over following orders-problem solvers who want to leave their mark on a fast-evolving industry. Candidates from product-driven backgrounds (rather than consulting or outsourcing) who value autonomy and ownership. Business-level English is required; Japanese is a plus but not mandatory. Tech Stack Highlights Nuxt 3 (Vue.js 3, TypeScript), REST APIs, TanStack Query, Zod, Storybook CI/CD with GitHub Actions, AWS S3/CloudFront/Route53 Modern collaboration tools: GitHub, Slack, Zoom, Miro, JIRA Why Now? Japan's tech sector is undergoing a digital revolution, with a critical shortage of skilled IT professionals and a surge in demand for those ready to lead modernization efforts. This is a rare chance to join a company with strong financial backing and a startup mindset-where you'll help set the standard for the next era of fintech in Tokyo and beyond.Reference Number: 06940-0013246353By 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/S2hhbmcuTGUuNTI1NDEuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-06-19T02:05:48Z

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

Senior Frontend Engineer (Fully Remote, Japan-Based)

Tokyo,
remote
Permanent
7.0M - 10.0M JPY / Yearly
Selling points<Why This Role is Perfect for You><ul><li>Fully Remote Flexibility: Work from anywhere in Japan, with the option to join team sessions at a Tokyo office if you choose-collaboration is encouraged, never mandated.</li><li>Cutting-Edge Product: Shape the frontend for an AI Data Platform used by leading manufacturers. Your work will directly impact how industrial data is leveraged worldwide.</li><li>Modern Tech Stack: TypeScript, React, Apollo, Next.js, WebGL, WebAssembly, and more. Work with the latest tools and frameworks to solve complex, meaningful problems.</li><li>Technical Leadership: Lead technology selection, architectural decisions, and technical strategy for a rapidly scaling product and organization.</li><li>Collaborative, Global Team: Work with passionate engineers from Japan and abroad. English is the main language for many teams, and you'll be part of a diverse, supportive environment.</li><li>Real Impact: Help deliver products that change workstyles and create societal value by transforming industrial structures.</li><li>Professional Growth: Gain experience scaling products globally, solving challenging problems, and contributing to a mission-driven organization.</li></ul>Company Profile<ul><li>Our client is a rapidly growing, product-driven SaaS company, recognized for revolutionizing manufacturing workflows with advanced data and machine learning.</li><li>With a multinational, engineering-centric culture and a strong Tokyo presence, you'll enjoy the freedom of full remote work anywhere in Japan, plus the option to collaborate in a modern Tokyo office for team synergy.</li></ul>The Role<What You'll Do><ul><li>Lead frontend architecture and technology selection for the AI Data Platform and related products.</li><li>Build sustainable, maintainable frontend applications with a focus on long-term operability.</li><li>Rapidly iterate and validate product features, collaborating closely with designers to enhance UI/UX.</li><li>Design and implement reusable UI components and standardize frontend development practices.</li><li>Evaluate and integrate new technologies, frameworks, and middleware as the team scales.</li><li>Provide technical leadership, mentor team members, and align technical strategy with business goals.</li></ul>Your Skills<What You Bring><ul><li>7+ years of hands-on frontend development experience for web applications.</li><li>Advanced proficiency in TypeScript and experience building reusable UI components.</li><li>Proven track record leading technology selection, requirements definition, and frontend architectural design.</li><li>Experience working with modern frameworks (React, Next.js, Apollo, etc.) and familiarity with SSR, CSR, SSG, or PWA is a plus.</li><li>Strong communication skills in English (business-level or above).</li><li>Currently residing in Japan with a valid working visa.</li><li>A mindset aligned with the mission to "unleash the potential of manufacturing," with ownership, positivity, and a collaborative, respectful approach to problem-solving.</li><li>(Preferred) Experience with large-scale service development, backend technologies (Node.js), BFF (GraphQL/Apollo), and optimizing web performance.</li><li>(Preferred) Conversational-level Japanese (N2 or above), as communication is a mix of Japanese and English.</li></ul>Salary<ul><li>7,000,000 yen - 10,000,000 yen</li></ul>Location<ul><li>Tokyo</li></ul>Reference number: 06940-0013211509By 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/S2hhbmcuTGUuMDg1NDkuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-06-05T05:47:58Z

Back End Engineer

Tokyo,
remote
Permanent
8.0M - 10.0M JPY / Yearly
About the OpportunityAre you ready to drive innovation in a rapidly scaling tech company with a global vision? We are seeking a mid to senior-level software engineer to join a dynamic team at the heart of Tokyo's thriving product development scene. This is your chance to architect and deliver cutting-edge solutions that power real-world impact, all within a collaborative, international environment.What's In It For You<ul><li>Shape the Future: Lead the creation of new digital products from the ground up, influencing technology choices and product direction from day one.</li><li>Global Collaboration: Work alongside talented professionals from diverse backgrounds, with English as the primary language of communication.</li><li>Growth & Ownership: Be empowered to take initiative, drive technical decisions, and help scale a high-performing engineering team.</li><li>Competitive Rewards: Attractive annual compensation (8.5M-12M JPY), regular salary reviews, and stock options to share in the company's success.</li><li>Flexible Work: Hybrid work style with core hours and the freedom to manage your own schedule. Occasional in-person sessions foster team spirit and innovation.</li></ul>Your Role<ul><li>Spearhead the end-to-end development of new applications, from technology selection and domain modeling to system architecture and deployment.</li><li>Collaborate with cross-functional teams-product managers, designers, and engineers-to deliver high-impact solutions.</li><li>Mentor and guide team members, instilling best practices and a culture of technical excellence.</li><li>Contribute to the evolution of a global engineering organization, helping shape processes and standards as the company scales.</li></ul> What We're Looking ForMust-Have Skills & Experience:<ul><li>5+ years building and deploying web applications on cloud platforms (GCP, AWS, or Azure).</li><li>Proven leadership in shipping projects with teams of 5+ engineers.</li><li>Deep expertise in system design, architecture, and delivering robust, scalable solutions.</li><li>Experience working with multiple programming languages and frameworks.</li><li>Ability to communicate complex technical ideas fluently in English.</li></ul>Preferred Qualifications:<ul><li>Hands-on experience with Docker-native infrastructure and CI/CD pipelines.</li><li>Solid background in backend development using statically typed languages (e.g., Rust, TypeScript, Node.js).</li><li>Familiarity with microservices, asynchronous processing, and secure web application design.</li><li>Exposure to modern frontend frameworks (React.js) and domain-driven design.</li><li>Track record of technical leadership in fast-paced, ambiguous environments.</li></ul>Who Thrives Here<ul><li>Visionaries who are passionate about transforming industries through technology.</li><li>Problem-solvers who embrace challenges and take ownership of outcomes.</li><li>Team players who foster open, respectful communication and thrive in multicultural settings.</li><li>Lifelong learners eager to explore new tools, languages, and design patterns.</li></ul>Tech Stack Snapshot<ul><li>Frontend: TypeScript, React, Next.js</li><li>Backend: Rust (axum), TypeScript, Node.js (Express, Fastify, NestJS)</li><li>Infrastructure: Docker, Kubernetes, Google Cloud, Cloudflare, Istio</li><li>DevOps: GitHub, ArgoCD, Terraform, Datadog, Sentry</li><li>Data: PostgreSQL, BigQuery, AlloyDB</li><li>APIs: GraphQL, REST, gRPC</li><li>Collaboration: Slack, Discord, JIRA, Miro</li></ul>Salaary8 - 10 million YenLocationTokyoReference No.: 06940-0013244592 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/S2hhbmcuTGUuOTI3NzkuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-06-17T04:42:04Z

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

Software Engineer (Python)

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
About this role:<ul><li>Design, develop, test, and maintain scalable software applications</li><li>Collaborate with cross-functional teams including product, design, and QA</li><li>Participate in code reviews and ensure adherence to coding standards</li><li>Contribute to architectural decisions and technical design discussions</li><li>Implement CI/CD pipelines and automate deployment processes</li><li>Monitor system performance and troubleshoot production issues</li></ul>** Our engineer team is very international, but during interview you are expected to speak both in English and Japanese Responsibilities:<ul><li>Proficiency in Python (Django), JavaScript, and TypeScript (React.js)</li><li>Experience working with a cloud platform (preferably Microsoft Azure)</li><li>Passionate about leveraging AI to accelerate innovation, streamline processes, and drive transformative outcomes across the organization</li><li>Strong problem-solving skills and adaptability in dynamic environments</li><li>Good communication and collaboration skills across teams</li><li>Exposure to Agile/Scrum development methodologies</li><li>Experience with API design and integration (REST, GraphQL)</li></ul>Salary8M - 12M JPYLocation Tokyo Reference Number: 06940-0013283726By 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/TmFuY3kuWXVhbi40NDQ1Mi4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-08-20T07:29:48Z

Senior Backend Engineer

Tokyo,
remote
Permanent
10.0M - 16.0M JPY / Yearly
Client Profile: The client is an AI start-up in Tokyo which creates end to end AI/Data solutions to major domestic clients in Japan. We are looking for a senior backend engineer with hands-on development experience of creating AI products and keen interest towards this field. Key Responsibilities: Design & develop core AI product (primarily Python) Build architectures for seamless multi-agent collaboration systems Implement high-performance, scalable multi-tenant runtime environments Optimize for real-time inference in cloud-native settings (GCP/Kubernetes) Collaborate with research teams to productize LLM advancements Technical leadership, process improvement & team mentoring Drive complex feature implementation and system performance optimization Requirements: Bachelor's/Master's in CS, AI, ML, Math, Physics or related 5+ years Python application development 3+ years machine learning (regression, classification, clustering, model evaluation) 3+ years NLP (NLTK, spaCy, Transformers, BERT, GPT fine-tuning) Cloud platforms (AWS/GCP/Azure) & containerization experience Business-level English OR Japanese proficiencySalary 10M - 16M JPYLocation Tokyo Reference Number: 06940-0013273193By 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/TmFuY3kuWXVhbi4zNzA4My4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2025-08-04T07:35:14Z

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

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

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

Frontend Developer in Fukuoka (hybrid) - Must have work visa

Fukuoka,
remote
Permanent
6.5M - 10.0M JPY / Yearly
Frontend Engineer - Business Cloud Services (Fukuoka Office / Hybrid Work) Applicants must reside in Japan. We are hiring a frontend engineer to join our Fukuoka Development Base, a growing hub dedicated to building business-oriented cloud platforms. Established with a focus on innovation and ownership, this base plays a key role in developing core services used by enterprises across the country-including expense management, accounts payable, and a cashless business payment platform launched from Fukuoka. As a frontend engineer, you'll work closely with product teams to enhance UI/UX, improve performance, and contribute to scalable, modern frontend architecture using React and TypeScript. Key Qualifications:<ul><li>Strong web application development experience (HTML, CSS, JavaScript)</li><li>Hands-on experience with React or similar component-based frameworks</li><li>Passion for frontend quality, usability, and maintainability</li></ul> Preferred:<ul><li>TypeScript, GraphQL, Jest, or accessibility knowledge</li><li>Familiarity with modern frontend tooling and agile workflows</li></ul> Work Setup:<ul><li>Hybrid model: minimum 2 days/week at our Fukuoka office</li><li>English is the main development language; Japanese not required but interest in learning is welcomed</li><li>PC/equipment support, book purchases, conference participation available </li></ul>Working Place: Fukuoka (hybrid work) Reference No.: 06940-0013264316By 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/U2hpbWFtdXJhLlNoaW5vYnUuOTc4NjIuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2025-07-18T01:25:41Z

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">
2025-08-25T08:35:21Z

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 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">
2025-09-02T04:57:57Z

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">
2025-09-02T05:58:45Z

Android Developer

Tokyo,
remote
Permanent
8.0M - 12.0M JPY / Yearly
Are you passionate about building products that impact hundreds of millions of users? Join a team developing the Android client for one of the most widely used communication apps in Japan and across Asia. This platform is evolving beyond messaging, integrating AI and diverse services to become an essential life platform for daily living. What You'll Do -Collaborate with project managers, UI/UX designers, data scientists, and business stakeholders to design, develop, and enhance Android client features. -Drive stability and performance improvements for an app relied upon daily by millions. -Participate in ongoing codebase improvements, refactoring, and performance optimization. -Contribute to the development environment, including CI automation and code review workflows. -Engage with user feedback to deliver meaningful product enhancements. -Work on a large-scale, mature codebase with opportunities to influence architecture and best practices. Who We're Looking For - Strong communicator in English OR Japanese. - Experience developing native Android applications using Kotlin and Java in a team environment (including code reviews). - Ability to propose and drive improvements across planning, development, and testing processes. - Eager to enhance team productivity through codebase, tooling, or knowledge sharing. - UI/UX design and development experience.Salary - 8 million yen - 12 million yen Location - TokyoReference number:06940-0013256389By 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/V2F0dW55dS5TaXJpcGFpcm9qLjcyODc2LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2025-07-08T05:29:57Z

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