Top Tech Jobs & Startup Jobs in Japan

Design and build core systems for AAA action or online games, including progression, equipment, skills, economy, rewards, balancing, and system integration. Develop intuitive UX/UI specifications, create detailed documentation, collaborate with programmers, artists, and QA, and design playtests to improve gameplay based on results. The role requires game-system design experience, numerical balancing skills, cross-functional communication, game development fundamentals, and preferably Unreal Engine and data analytics experience.

Build end-to-end machine learning systems spanning research reproduction, model evaluation, inference infrastructure, backend services, and product interfaces. Design rigorous experiments, evaluation datasets, and verification workflows; analyze model internals; investigate provenance and evasion; and convert findings into reliable production systems with APIs, background jobs, observability, testing, documentation, and user-facing React/TypeScript experiences.

Build and scale Base360.ai’s short-term rental platform across frontend, backend, integrations, automation, dashboards, and AI-powered workflows. Work directly with customers, founders, and designers to identify problems, ship end-to-end solutions, and improve product outcomes. Develop reliable APIs, event-driven automations, cloud infrastructure, and integrations with Airbnb, Stripe, Twilio, OpenAI, and other platforms. Own features from discovery through deployment while balancing usability, security, scalability, and maintainability.

Supports enterprise information security governance, risk, and compliance across security, privacy, data, AI, regulatory, and assurance functions. Responsibilities include developing controls and policies, mapping ISO and regulatory requirements, coordinating audits and evidence, managing exceptions and remediation, supporting ISMS and ISMAP readiness, enabling governance automation, coaching stakeholders, and reporting risk metrics. The role also contributes to responsible AI governance, data governance, awareness initiatives, incident-response governance, and continuous improvement.

Develop realistic backend coding challenges, including feature implementations and bug fixes, for AI training projects. Design deterministic verifiers, automated tests, and validation criteria that distinguish correct from incorrect solutions. Evaluate code for correctness, reliability, maintainability, security, and performance while identifying edge cases and bottlenecks. Work independently with backend technologies and refine tasks based on project requirements and quality standards.

Leads multi-country HR service delivery across APAC and/or the Middle East, overseeing escalations, compliance, case quality, SLAs, operational controls, audit readiness, and process standardization. Manages and mentors HR service delivery specialists, collaborates with Payroll, Benefits, Legal, Finance, vendors, clients, and workers, and drives automation, workflow optimization, risk mitigation, and continuous improvement.

Serves as the primary technical partner for enterprise customers, leading Claroty solution planning, deployment, configuration, adoption, optimization, and technical support. Provides architecture guidance, manages risks and escalations, creates technical documentation, translates customer feedback for internal teams, and presents strategic cybersecurity roadmaps to technical and executive stakeholders. Requires frequent customer engagement and up to 30% travel.

Design and execute comprehensive test plans for dApps and smart contracts, perform unit/integration/end-to-end testing, run security audits and vulnerability assessments, automate tests within CI/CD pipelines, monitor quality metrics, debug issues, and collaborate with developers and product managers to ensure reliable DeFi/EVM-compatible applications.

Designs and delivers Active Directory and Microsoft Entra ID solutions for customers in Japan. Leads hybrid identity and migration projects, including Entra Connect, Join, and Conditional Access. Responsibilities include discovery, assessment, solution design, migration planning, technical reviews, customer workshops, troubleshooting authentication and synchronization issues, documentation, and managing multiple engagements independently.

Lead territory sales for Ionpure in Japan, driving aggressive growth through direct and channel sales. Responsibilities include forecasting, pipeline development, technical solution selling, account penetration, CRM management, market intelligence, partner training, trade show coordination, and cross-functional collaboration with engineering, aftermarket, and service teams to meet targets.