Full Stack Engineer Jobs

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Full Stack Engineer

Tokyo,
remote
Permanent
9.0M - 12.0M JPY / Yearly
Company Profile<ul><li>Global professional services firm is looking for a Software Engineer to build and maintain software solutions supporting the business side.</li></ul> The Role<ul><li>Design, develop, test, and maintain scalable, secure software applications aligned with business goals and user needs.</li><li>Work with product, design, and QA teams, and join code reviews and architecture and technical design discussions.</li><li>Build CI/CD pipelines, automate deployments, and monitor and troubleshoot production systems.</li><li>Maintain documentation for the codebase, APIs, and processes, and support internal and external audits and compliance.</li></ul> Your Skills<ul><li>5+ years of web app development with Django and ReactJS (mandatory).</li><li>Proficiency in Python, JavaScript, TypeScript, and PostgreSQL.</li><li>Hands-on Git and Docker, plus cloud experience (Microsoft Azure preferred).</li><li>Able to handle both development and maintenance work.</li><li>Passion for using AI to drive innovation and streamline processes.</li><li>Japanese: JLPT N2, English: business level</li><li>Nice to have: CI/CD (GitHub Actions, Azure DevOps), testing frameworks (PyTest, Jest, Cypress), system design, Agile/Scrum, REST/GraphQL, security best practices, monitoring (Prometheus, Azure Monitor), mentoring or leading small projects.</li></ul> Key Highlights of the Role<ul><li>Work on software for a leading global professional service company</li><li>Closely work with AI and build LLM products from day 1</li><li>Take part in architectural decisions, with room to mentor juniors and lead small projects.</li><li>Possible to work remotely with very rare office days</li></ul> Location Tokyo Salary9 - 12 million yen Reference Number: 06940-0013521216 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/TmFuY3kuWXVhbi45NTkwOS4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-10-07T06:46:39Z

Software Engineer

Tokyo,
remote
Contract
16.9M - 16.9M JPY / Yearly
Company ProfileA venture-backed AI technology company focused on developing verifiable and explainable AI solutions for scientific and engineering applications. The company combines advanced machine learning, formal reasoning, and domain expertise to accelerate innovation in complex technical fields, including engineering design, semiconductors, and scientific research. The Role<ul><li>Develop and maintain backend applications using Python/FastAPI and frontend applications using React/Next.js</li><li>Design APIs and databases, and optimize SQL performance</li><li>Contribute to system architecture and technical decision-making</li><li>Build scalable, secure, and reliable systems</li><li>Develop and enhance AI-powered features and agent workflows</li><li>Integrate and utilize LLM technologies and AI platforms</li><li>Perform unit, integration, and end-to-end testing</li><li>Participate in code reviews and quality improvement initiatives</li><li>Collaborate closely with Tech Leads and AI Engineers</li><li>Support cross-functional development teams and knowledge sharing</li></ul> Your Skills <ul><li>Cloud platforms and infrastructure</li><li>AI/LLM integration (OpenAI, Anthropic, Vertex AI, etc.)</li><li>Testing (Unit, Integration, E2E)</li><li>System design and scalable architecture</li><li>CI/CD and software engineering best practices</li><li>Troubleshooting and production support</li></ul> Key Highlights of the Role <ul><li>Work on next-generation AI products for science and engineering.</li><li>Build both full-stack applications and AI-powered features.</li><li>Influence system architecture and technical strategy.</li></ul> Salary8,125 JPY　〜 hourly Reference Number: 06940-0013502812 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/bWljaGFlbC5oYWdlZG9ybi45MjQ2Ni4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-10-02T03:30:41Z

Head of Development

Tokyo,
remote
Permanent
20.0M - 30.0M JPY / Yearly
Company Profile Construction AI company building an AI-native quantity-takeoff system, adopted by major general contractors and building materials manufacturers, is looking for a staff engineer to lead its full-stack AI platform. The Role <ul><li>You will coordinate the AI, frontend and backend teams to deploy multi-model AI pipelines (vision-language, OCR, segmentation, object detection) into production.</li><li>You will deliver interactive web canvases (2D/2.5D) that let industry experts inspect and edit AI results in real time.</li><li>You will drive domain architecture for a multi-tenant enterprise data model (MDM, CPQ, quantity takeoff) and optimize model serving to achieve sub-second multi-model execution.</li><li>You will raise the engineering bar across the team (schema migration, evaluation harnesses) and translate client and PM needs into technical roadmaps.</li></ul> Your Skills <ul><li>Fluent or native level Japanese</li><li>You have one or two of the strengths below:</li></ul><ol><li>Hands-on experience deploying AI models to production alongside AI research/engineering teams.</li><li>Track record of designing sophisticated software systems and aligning frontend and backend engineers.</li><li>Experience leading engineering teams and cross-functional units, including working with PMs and external clients.</li><li>Experience with CAD/BIM or spatial data, ERP/CPQ integrations, CUDA/C++, vLLM/llama.cpp, or distributed multi-time-zone teams is a plus.</li></ol> Key Highlights of the Role <ul><li>Work on proprietary in-house AI models that outperform commercial frontier models, not "wrapper" products.</li><li>Join a small, elite team with real ownership and autonomy.</li><li>Be part of a fast-growing company expanding globally</li><li>Shape the future of construction through the world's first product of its kind, originating from Tokyo.</li></ul> Location Tokyo Salary20 - 30 million yen Reference Number: 06940-0013517591 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/TmFuY3kuWXVhbi4xMzQ1NS4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-10-01T06:06:31Z

Data Engineer

Tokyo,
remote
Permanent
10.0M - 10.0M JPY / Yearly
<div><h2>Company Profile</h2>Our client is a well-established global financial services organization with a strong presence in Japan and international markets. The company is investing heavily in data modernization, cloud adoption, and digital transformation initiatives, offering technology professionals the opportunity to work on mission-critical platforms that support large-scale business operations.<h2>The Role</h2>We are seeking an experienced ETL Developer / Data Integration Engineer to support enterprise data integration initiatives and cloud migration projects.Key responsibilities include:<ul><li>Develop, operate, and enhance ETL processes using Informatica PowerCenter.</li><li>Lead ETL migration initiatives from on-premise environments to Informatica Cloud Data Integration (CDI).</li><li>Assess existing ETL assets and design migration strategies for cloud-based architectures.</li><li>Design and implement data integration solutions across multiple internal systems.</li><li>Develop complex data mappings, transformation logic, and large-scale batch processing solutions.</li><li>Collaborate with business and technical stakeholders to gather requirements and provide technical recommendations.</li><li>Coordinate with external vendors and review development deliverables.</li><li>Monitor production batch processes, troubleshoot incidents, perform root cause analysis, and implement preventive measures.</li><li>Contribute to the modernization of enterprise data platforms and integration frameworks.</li></ul><h2>Your Skills</h2><ul><li>Experience developing and supporting ETL solutions using Informatica PowerCenter.</li><li>Knowledge of Informatica Cloud Data Integration (CDI) or cloud-based ETL migration projects.</li><li>Strong understanding of data integration, data warehousing, and batch processing.</li><li>Experience designing data mappings and transformation logic across multiple systems.</li><li>Ability to analyze business requirements and translate them into technical solutions.</li><li>Experience working with external vendors and cross-functional teams.</li><li>Strong problem-solving and troubleshooting skills.</li><li>Business-level Japanese and the ability to communicate effectively with stakeholders.</li></ul><h2>Key Highlights of the Role</h2><ul><li>Opportunity to lead strategic cloud migration and data transformation initiatives.</li><li>Work on large-scale enterprise systems that support critical business operations.</li><li>Exposure to modern cloud technologies and next-generation data platforms.</li><li>High visibility role with extensive stakeholder engagement across business and technology teams.</li><li>Stable and collaborative working environment within a global organization.</li><li>Competitive compensation package with strong career development opportunities.</li></ul><h2>Location</h2>Tokyo<h2>Salary</h2>JPY 10,000,000 <div> </div><div>Reference Number</div>06940-0013502823 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.</div> <img src="https://counter.adcourier.com/U21haWwuU2FmaS4zMDEyNS4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-09-29T03:37:32Z

Senior Software Engineer

Tokyo,
remote
Permanent
15.0M - 15.0M JPY / Yearly
Company ProfileA leading global financial services organization providing investment banking, securities, asset management, and financial technology solutions to institutional and corporate clients worldwide. The company leverages advanced technology platforms, cloud infrastructure, and data-driven innovation to support mission-critical financial services across global markets. The Role<ul><li>Design, develop, and maintain large-scale, high-performance software platforms and services.</li><li>Build cloud-native applications, APIs, and distributed systems supporting critical business operations.</li><li>Collaborate with global engineering, business, and operations teams to deliver scalable technology solutions.</li><li>Drive system modernization initiatives, including cloud migration and platform transformation.</li><li>Contribute to architecture decisions, performance optimization, and production reliability.</li><li>Mentor engineers and promote engineering best practices across the organization.</li></ul> Your Skills <ul><li>Strong software development experience in Java, Python, C++, or related technologies</li><li>Experience with cloud platforms, microservices, and distributed systems architecture</li><li>REST API development and database design experience</li><li>Knowledge of CI/CD, DevOps, system monitoring, and automation</li><li>Strong problem-solving and troubleshooting skills</li><li>Business-level communication skills in English</li></ul> Key Highlights of the Role <ul><li>Join a world-class engineering organization within the financial services industry.</li><li>Work on highly scalable platforms supporting global business operations.</li><li>Collaborate with international teams and cutting-edge technology environments.</li><li>Influence architecture, technical strategy, and next-generation platform development.</li><li>Gain exposure to cloud, distributed systems, and AI-enabled engineering practices.</li></ul> Location Tokyo Salary15 million yen Reference Number: 06940-0013501947 <img src="https://counter.adcourier.com/c3VlLnRpbmcuNzc3OTUuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2026-10-02T04:50:06Z

Back End Engineer

Tokyo,
remote
Permanent
8.0M - 10.0M JPY / Yearly
Company Profile<ul><li>Profitable, post-IPO travel tech SaaS helping hotels across Asia is looking for a Senior Software Engineer to lead its move from monolith to microservice.</li></ul> The Role<ul><li>The company is moving to a service-oriented architecture, with focus on kotlin and Golang</li><li>Act as a domain leader: work with PMs to define what to build, mentor engineers, set architecture standards, and drive technical decisions across teams.</li><li>Push a "you build it, you run it" culture: zero-downtime deployments, observability, and honest post-mortems.</li></ul> Your Skills<ul><li>Statically-typed language experience (Go, Kotlin, Scala, Rust, or C#) with strong async and concurrency knowledge.</li><li>Experience building services in an SOA, plus maintaining and refactoring monolithic or legacy codebases.</li><li>CI/CD (GitHub Actions, CircleCI) and zero-downtime deployments.</li><li>Scalable storage (Cassandra, AWS Aurora) and database schema design for consistency and scale.</li><li>Monitoring, logging, and alerting tools (Datadog, Grafana, Prometheus).</li><li>Strong English communication; able to mentor, define deliverables, and influence across teams.</li></ul> Key Highlights of the Role<ul><li>Stable and profitable, with startup agility: flat structure, one management layer, and close work with the founders.</li><li>International team with English as the primary language</li></ul> Location Tokyo Salary8 - 10 million yen Reference Number: 06940-0013343690 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/TmFuY3kuWXVhbi41OTg5Ny4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-10-07T07:16:55Z

Systems Engineer

Tokyo,
remote
Permanent
10.0M - 10.0M JPY / Yearly
Company Profile<div>A major global financial institution with a presence across multiple international markets.</div> The RoleResponsibilities<ul><li>Led the administration and enhancement of enterprise infrastructure platforms supporting critical business operations.</li><li>Delivered infrastructure modernization initiatives, including service improvements, automation, and cloud adoption projects.</li><li>Provided advanced support and troubleshooting for global production environments.</li><li>Worked closely with cross-functional technology teams to ensure platform stability, scalability, and performance.</li><li>Automated operational processes and implemented solutions to improve service efficiency and reduce operational risk.</li><li>Participated in the design and implementation of infrastructure and service reliability improvements.</li><li>Maintained operational documentation and supported knowledge transfer across teams.</li><li>Coached and supported junior team members while promoting best practices in platform operations and engineering.</li></ul> Your Skills <Mandatory Skills><ul><li>Strong verbal and written communication skills in English.</li><li>Extensive experience with enterprise Linux operating systems and high-availability environments.</li><li>Hands-on expertise in infrastructure automation, configuration management, and platform administration.</li><li>Experience supporting and managing virtualized server environments.</li><li>Proven ability to troubleshoot complex technical issues and restore critical services.</li><li>Strong analytical and problem-solving skills in production environments.</li></ul><Preferred Skills><ul><li>Experience supporting high-precision time synchronization services in mission-critical environments.</li><li>Knowledge of enterprise network services, including DNS, DHCP, and IP address management solutions.</li><li>Understanding of modern infrastructure management, automation practices, and service reliability principles.</li><li>Scripting and automation skills using common programming and infrastructure-as-code tools.</li><li>Experience with server and network hardware deployment, maintenance, and lifecycle management.</li><li>Conversational-level Japanese communication skills.</li></ul><Required Soft Skills><ul><li>Self-motivated with a strong desire to learn and continuously develop new skills.</li><li>Comfortable working in a dynamic, fast-paced, and evolving environment.</li><li>Able to work independently while effectively managing multiple priorities and deadlines.</li><li>Strong organizational, time management, and prioritization skills.</li><li>Proactive and solution-oriented approach to resolving challenges and issues.</li><li>Excellent interpersonal and collaboration skills, with the ability to work effectively across teams.</li><li>Strong written and verbal communication skills in English.</li><li>Analytical mindset with strong problem-solving and decision-making abilities.</li><li>Ability to understand business objectives and communicate technical concepts effectively to both technical and non-technical stakeholders.</li></ul> Location Tokyo Salary10 million yen Reference Number: 06940-0013480023 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/SGluc29uLkxldW5nLjU5OTg5LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2026-08-27T07:10:43Z

Software Engineer (BI Developer)

Tokyo,
remote
Contract
12.0M - 12.0M JPY / Yearly
The Role<ul><li>This role focuses on building a finance and budgeting solution using Excel-based tools, data integration, dashboards, and automation.Main responsibilities include:<ul><li>Developing a single-source budget planning workbook with input templates, master data integration, ID management, validation rules, management views, and export functions for finance submissions</li><li>Creating a structure that connects budget and actual data through a common key, including data import, transformation, quality checks, and integration across shared files and platforms</li><li>Designing and building financial dashboards in a BI tool for reporting such as budget vs actual, forecast tracking, year-over-year comparison, and analysis by function, region, service, vendor, and charge type</li><li>Implementing automation for business processes, including workflow automation, scripting, spreadsheet automation, data refresh, and recurring report updates</li></ul>Required skills include:<ul><li>Strong experience with BI development, data modeling, calculations, dashboard design, and BI services</li><li>Advanced spreadsheet skills, query tools, scripting or VBA, and workflow automation</li><li>SQL, ETL/data transformation, file-based data integration, and data quality management</li><li>System development experience including design documentation, testing, requirements-based development, and error analysis/remediation</li></ul></li></ul>Location Tokyo Salary12 million yen Reference Number: 67040-0013491969 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure. <img src="https://counter.adcourier.com/YWhtYWQucm95YW5pLjkxNTMyLjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2026-09-04T06:21:39Z

Application architect

Tokyo,
remote
Permanent
13.0M - 18.0M JPY / Yearly
The Role<ul><li>You are expected to lead the organization not through formal authority, but through your expertise, empathy, and communication skills.</li><li>Rather than taking ownership of a specific service, you will take responsibility for "problem areas," structuring those problems, aligning stakeholders, and driving initiatives across multiple teams.</li><li>This role involves developing a vision for development productivity, translating it into a roadmap, and measuring and communicating the results.</li><li>Furthermore, you will contribute to improving the organization's overall productivity and developer experience capabilities through mentoring and coaching engineers and leaders.</li></ul> Your Skills <ul><li>Experience in building and operating developer tools, internal platforms, CI/CD, and build systems.</li><li>Experience in SRE, infrastructure, or production engineering.</li><li>Tech lead experience in a product or platform team.</li><li>Experience driving technological change through influence across multiple teams without direct reporting lines.</li><li>Experience collaborating with teams in multiple locations and remote environments.</li><li>Experience leading technical design in complex multi-team environments, experimental approaches, and phased improvement delivery.</li><li>Strong communication skills with a wide range of stakeholders, from management to on-site engineers (in both English and Japanese).</li></ul> Location Tokyo Salary13 - 18 million yen Reference Number: 67040-0013495250 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/VmljdG9yaWFSeW8uNzA3ODAuMTA4OThAcmhpanAuYXBsaXRyYWsuY29t.gif">
2026-08-27T06:30:08Z

IT Consultant

Tokyo,
remote
Permanent
10.0M - 10.0M JPY / Yearly
<div><h1>Company Profile</h1>A global business and technology consulting firm that helps organizations drive digital transformation, technology modernization, cloud adoption, data-driven decision-making, and AI-enabled innovation. The company partners with clients across multiple industries to deliver strategic initiatives, large-scale technology programs, and sustainable business outcomes.<h1>The Role</h1><ul><li>Support clients in developing and executing technology transformation strategies.</li><li>Lead or contribute to complex IT and digital transformation projects from planning through implementation.</li><li>Collaborate with business stakeholders, technical teams, and project leadership to deliver measurable business value.</li><li>Assess current technology landscapes and recommend innovative solutions to improve operational effectiveness and customer outcomes.</li><li>Facilitate communications between business and technical teams to ensure successful project delivery.</li></ul><h1>Your Skills</h1><ul><li>Experience in IT consulting, technology strategy, digital transformation, or project management.</li><li>Ability to engage with executive stakeholders and cross-functional teams.</li><li>Strong analytical, problem-solving, and communication skills.</li><li>Understanding of enterprise technologies, cloud platforms, data, AI, or modern application architectures.</li><li>Experience delivering large-scale business or technology projects.</li></ul><h1>Key Highlights of the Role</h1><ul><li>Opportunity to work on high-profile digital transformation initiatives.</li><li>Exposure to emerging technologies including AI, cloud, data platforms, and modern enterprise solutions.</li><li>Collaboration with diverse clients across multiple industries.</li><li>Strong career development opportunities within a growing global consulting environment.</li><li>Highly collaborative and people-focused culture.</li></ul><h1>Location</h1>Tokyo<h1>Salary</h1>JPY 10,000,000Reference Number: 06940-0013496992 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.</div> <img src="https://counter.adcourier.com/TWlraXRvLk5haXRvLjExMjA4LjEwODk4QHJoaWpwLmFwbGl0cmFrLmNvbQ.gif">
2026-09-11T05:57:11Z

Data Scientist - ML/AI

Tokyo,
remote
Permanent
9.0M - 14.0M JPY / Yearly
Company ProfileA major Japanese internet services conglomerate is hiring a Senior Data Scientist for its global ad technology division. The division runs the advertising systems behind the group's e-commerce and digital services, with a diverse team spread across Japan, Singapore, India, China, and the UK. The Role<ul><li>The in-house ad serving platform handles tens of thousands of QPS at under 100ms latency and processes tens of billions of log records each month. It is now strengthening the in-house development of its core algorithms to set itself apart in a competitive, AI-driven market.</li><li>You will drive ad delivery optimization end to end, from problem definition and KPI design through modeling, online deployment, evaluation, and continuous improvement.</li><li>Your focus will be on price optimization, CTR/CVR and value prediction, and creative optimization, including feature engineering and offline evaluation and simulation.</li><li>You will design A/B tests and bandit experiments, plan rollouts, and build MLOps pipelines with monitoring, drift detection, and automated rollback.</li><li>You will join a team of about 20 engineers (SRE, backend/frontend, data, SDK, QA) and work closely with product, engineering, and sales/operations stakeholders.</li></ul> Your Skills Mandatory<ul><li>5+ years of hands-on data analysis and machine learning experience with Python and SQL (Pandas, NumPy, scikit-learn)</li><li>Experience processing large-scale data (e.g., Spark, BigQuery) and building reproducible analytics environments</li><li>A strong foundation in statistics, causal inference, and experimental design, including A/B test design and analysis</li><li>Experience developing ML models (GBDT, logistic regression, simple neural networks) with rigorous offline/online evaluation and calibration</li><li>Knowledge of digital advertising (CTR/CVR prediction, bidding, budget pacing), or optimization experience in an adjacent domain</li><li>Production experience with model deployment, pipeline operations, monitoring, and drift detection</li><li>A degree in computer science, statistics, applied mathematics, or a related field, or equivalent practical experience</li><li>Fluent English, or TOEIC 800+ or equivalent</li></ul> Desired<ul><li>Knowledge of ad auctions and mechanism design (first-/second-price auctions, bid shading, reserve price optimization)</li><li>Hands-on experience with price optimization methods such as Bayesian optimization, contextual bandits, or reinforcement learning</li><li>Experience with creative optimization, streaming platforms (Kafka/Flink/Beam), and real-time inference</li><li>MLOps practices (feature stores, CI/CD, Docker/Kubernetes) and GCP experience (BigQuery, Vertex AI, Dataflow)</li><li>Business-level Japanese (JLPT N2 or equivalent)</li></ul> Key Highlights of the Role <ul><li>Build the core algorithms of a large-scale ad platform used across one of Japan's largest internet ecosystems.</li><li>Take ownership of the full ML lifecycle, from hypothesis to production, with real business impact.</li><li>Work hands-on with high-traffic, low-latency systems and big data on a modern GCP stack.</li><li>Collaborate in a multinational team across five countries and work alongside leading external ad platforms.</li></ul> Location Tokyo Salary9 - 14 million yen Reference Number: 06940-0013531637 By clicking 'apply', you are deemed to have agreed to Robert Half Japan Privacy Notice (<a href="https://www.roberthalf.com/jp/en/privacy">https://www.roberthalf.com/jp/en/privacy</a>). Please ensure that your application documents do not include sensitive personal data such as race, beliefs, medical history, criminal record, or other information irrelevant to hiring process such as spouse or dependents. All information must be accurate and truthful, and any included hyperlinks must be safe and secure.<img src="https://counter.adcourier.com/U21haWwuU2FmaS41MTE5MS4xMDg5OEByaGlqcC5hcGxpdHJhay5jb20.gif">
2026-10-26T02:19:29Z

11 results for Full Stack Engineer jobs