Engineering Jobs in Japan
Japan's tech scene is hiring international engineers. Browse frontend, backend, mobile, DevOps, data, and machine learning roles at companies that welcome English-speaking talent. Many offer remote work, visa sponsorship, and no Japanese requirement.
100 open positions
Refine with filters →Senior Software engineer, Android (Mobile Enablement) - Mercari
Mercari本ポジションは日本語JDの用意がありません。Employment Status: Full-time Work Hours: Full Flextime (no core time) Office: Roppongi Specific work responsibilities are listed below: Periodically join your fellow product engineers in designing, implementing, and maintain high-quality Android features to understand their reality and define the best solutions for them. Own end-to-end development for platform and architectural solutions, from requirements definition through architecture, implementation, testing, and release. Lead architectural design for complex features and system components, ensuring maintainability, scalability, and reliability. Optimize app performance, startup time, memory usage, and stability across diverse devices and OS versions. Work closely with machine learning, backend, infrastructure, product, and design teams to deliver seamless mobile experiences, as well as other feature-owner Android engineering teams. Take ownership and evolve Mercari's mobile platform, SDKs, and shared modules used across teams. Drive high code quality through code reviews, automated testing, CI/CD improvements, and rigorous documentation. Champion engineering best practices and contribute to guidelines and standards across Client Engineering. Stay current with the latest developments in Android, Kotlin, Android Views, Jetpack Compose, coroutines, and mobile architecture patterns. Bring innovative ideas to improve user experience, developer experience, and operational efficiency. Take ownership of initiatives that span multiple teams, driving alignment and technical decision-making. Mentor junior and mid-level engineers, helping strengthen the overall technical capabilities of the team and the engineering organization. Unique Challenges: Enabling dozens of mobile engineers in delivering awesome experiences to our 20M+ users by leveraging a diverse skillset to provide the best mobile ecosystem. Deliver highly performant and reliable functionality in a fast-paced environment with complex product requirements. Bridge consumer-grade UX expectations with robust engineering architecture and infrastructure. Influence platform-wide technical strategy, shaping the future direction of Mercari's mobile and AI-native cross-platform ecosystem. Lead cross-functional efforts in ambiguous problem spaces where user needs and technical constraints must be balanced.
Applied AI Architect - Tokyo
OpenAIAs an AI Architect, you will be the senior technical owner for a named portfolio of customers and the primary technical counterpart to their leadership teams. You will act as the “CTO of your book of business”, shaping each customer's AI strategy and guiding their journey from pre-sales discovery and solution evaluation through deployment, adoption, and measurable business impact. You will own the technical account plan across ChatGPT Enterprise, the OpenAI API, Codex, and other agentic AI solutions. In partnership with the Account Director, you will translate business priorities into a focused use-case portfolio, an actionable adoption roadmap, and a clear path to durable customer value and growth. The Account Director owns commercial strategy; you own the technical strategy, customer journey, and path to production value. You will remain accountable for the technical outcome while bringing in the right specialists across deployment, implementation, enablement, security, product, and partners to provide deeper expertise and execute work where needed. This role calls for strong industry fluency, sound architectural judgment, and the ability to move confidently between executive strategy and hands-on technical conversations. You might thrive in this role if you have significant experience in customer-facing technical roles such as solutions architecture, solutions engineering, technical account leadership, AI deployment, or technical customer success. Have guided enterprise organizations from technical evaluation through production adoption and measurable business impact. Build credibility with senior technical and business leaders while communicating equally well with hands-on engineers. Bring strong software and cloud architecture foundations, including APIs, distributed systems, data integration, identity, security, and privacy. Understand modern AI systems, frontier LLM models, agentic applications, model evaluation, retrieval, or enterprise AI workflows. Can prototype, explain technical tradeoffs, and work confidently with APIs, SDKs, and languages such as Python or JavaScript. Exercise sound judgment about when to go deep personally, when to involve specialists, and how to define clear handoffs and ownership. Have experience developing technical account plans, prioritizing complex customer portfolios, and connecting adoption to measurable outcomes. Bring meaningful expertise in a relevant industry or strong fluency with the needs of digital-native businesses. Communicate clearly and can turn ambiguity into a practical technical narrative, executive decision, or action plan. Work collaboratively across disciplines and care deeply about helping organizations deploy advanced AI responsibly.
Software Engineer - Experimentation System - Mercari
Mercari本ポジションは日本語JDの用意がありません。For more details, see the Overview of Our Positions section on our Careers site. In the Strategic Experimentation & Analytics (SEA) team, we are responsible for the administration, operation, and optimization of the Experimentation Platform, a system that enables anyone at Mercari to perform A/B tests and experiments and safely and gradually roll out new features. The team oversees the Experimentation Platform and Feature Flags systems across prod and dev, handling incident response, demos, and roadmap planning while coordinating A/B testing and feature rollouts. This role is responsible for ensuring the delivery of a highly cost-effective data analytics environment. The successful candidate will build and maintain a mechanism that naturally fosters cost-awareness among users, eliminates operational waste, and ensures that finite computing resources are precisely allocated to high-priority business tasks. Continuously improve the system for access control, resource allocation, cost optimization, and usability to deliver sustained value to engineering and product teams. Architecting for modern AI Workflows. As the organization transitions to becoming AI-native, you will be instrumental in designing and building the systems that highly efficiently support new use cases, such as automated configuration, control and data utilization via AI agents.
Senior Data Scientist - AI Agent Development Section, Business Support Development Department (BSD)
RakutenRakuten is one of the leading E-commerce companies in the world. Our mission is to empower people and society through the internet while aiming at becoming the "Global Innovation Company." The Business Support Development Department (BSD) plays a crucial role in supporting various business operations that occur between users, clients, and Rakuten businesses from a systems perspective. Our division provides diverse services across four key domains: DATA, Business Support/Accounting, CRM, and AI Agent, which builds the foundation for leveraging AI across the entire Rakuten organization. We are committed to pursuing business process optimization and efficiency while delivering high value through our system offerings. AI Agent Development Section, established under BSD in January 2026, is dedicated to building next-generation AI agent application that empower Rakuten’s diverse business units through AI technology. Our mission is to reshape the digital future of E-commerce by building AI-native solutions that empower Rakuten merchants, catalyze new revenue growth, and radically reduce operational costs. Our main goal is to unify Merchant Communication Services. Consolidating fragmented communication services into a single, cohesive merchant interface to streamline communication and user experience. Design and deploy advanced machine learning models and LLM-based agents to automate and optimize merchant communication. Develop RAG (Retrieval-Augmented Generation) systems to provide accurate, context-aware responses to merchant inquiries. Analyze large-scale transactional and behavioral data to uncover insights that drive revenue growth and operational efficiency. Collaborate with product managers and engineers to integrate AI capabilities into the unified merchant interface. Mentor junior data scientists and establish best practices for AI development and model evaluation within the team.
Network Engineer
BoschYou will be responsible for building and managing networks in accordance with global-level concepts at Bosch's domestic locations (factories, warehouses, offices). You will support IT room management and the overall domestic IT infrastructure. You will assist in providing comfortable IT services through system troubleshooting and consulting. You will conduct asset planning, procurement, and management of IT infrastructure equipment, promoting strategic IT investments with a view to the future. You will actively engage in global/regional projects and internal/external audits, contributing to improvements across the organization.
DataOps Engineer - ADAS Data Platform
BoschWe are responsible for the operation and continuous improvement of the "ADAS Data Platform," which supports the evolution of Advanced Driver Assistance Systems (ADAS) and autonomous driving technology. Based in Japan, we work closely with members from various regions around the globe to contribute to the provision of a reliable, scalable, and efficient data platform that leads to the success of customer projects worldwide. In this position, you will be deeply involved in operational tasks that support large-scale vehicle sensor data, cloud storage infrastructure, recorded data management solutions, data lifecycle management, data quality processes, labeling pipelines, ML dataset generation, and data-driven development. The results you produce will directly enhance the reliability, scalability, and efficiency of our ADAS product development deployed globally, allowing you to experience the rewarding feeling of supporting the next generation of autonomous driving society from the ground up with technology.
Innovation Hub Solution Engineer - Cloud & AI
MicrosoftMicrosoft Innovation Hub empowers customers to overcome their business challenges through innovative engagements that integrate multiple areas of expertise. We drive AI transformation by leveraging evolving needs and emerging business opportunities. As the future of technologists and enterprise technical sellers, we guide customers from envisioning solutions to implementation. We deliver the Microsoft value story through immersive experiences, strengthening customer trust through deep engagements in exceptional environments. As a Solution Engineer in the Microsoft Innovation Hub, you will merge business and technical requirements to craft comprehensive solutions, working seamlessly with various stakeholders. You will conduct discovery sessions to understand customer needs and provide strategic recommendations and best practices tailored to their specific needs. Implementing robust AI transformation solutions and optimizing the integration of various technologies and services will be key aspects of your role. Additionally, you will leverage consultancy skills to foster collaboration among technical resources and stakeholders, ensuring alignment and effective teamwork. This role is Microsoft onsite only. Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.
RPA Server Architect / Technical Lead - Business IT Platform Section, Corporate IT Service Department (CITSD)
RakutenThe Technology Management Division (TMD) provides Corporate IT, and Cyber Security & Privacy Governance to Rakuten Group companies and essential business management for technology organizations, thereby enabling innovation and strengthening the technology foundation. Within TMD, the Corporate IT Supervisory Department (CITD) drives Rakuten Group’s global corporate IT services and infrastructure. Our mission is to empower Rakuten through innovative and secure IT solutions that enhance efficiency and foster productivity. The Corporate IT Service Department (CITSD) empowers Rakuten through innovative and secure IT solutions that drive efficiency and enhance productivity. Our service scope encompasses enterprise application management for core business functions, driving business process automation and digital transformation through our IT platform, providing comprehensive end-user support and operations, and optimizing IT processes to support a range of essential services and platforms. Our organization is advancing the design of integration platforms that connect with the RPA platform (Blue Prism) and numerous corporate IT systems, while also promoting AI-assisted application development and sophisticated Agentic Workflow development using no-code solutions. Through these initiatives, we are accelerating enterprise-scale automation solutions and enabling broader AI adoption across the organization. Lead the server architecture design, operations management, and incident response for the RPA execution platform (primarily Blue Prism), driving stable operations and continuous improvement. Design and operational management of the RPA execution platform. Administration of Windows Server, SQL Server, and VMware/Hyper-V environments. Incident response and Root Cause Analysis (RCA). Resolution of technical issues raised by RPA citizen developers. Operational design of CI/CD pipelines and deployment automation. Operational automation using PowerShell and similar technologies. Development and maintenance of standard operating procedures and operational rules. Evaluation and promotion of cloud migration and infrastructure improvements. AI platform design, PoC, prototyping, and architecture development. Process automation using AI solutions and design/implementation of Agentic Workflows. Team management and member development. The workplace is bright and friendly. It has an open and free atmosphere, making it an environment where you can actively express your opinions and make new proposals. Development environment : RPA (Blue Prism), ServiceNow, VMware, Hyper-V, Windows Server, SQL Server, Azure, M365 Copilot, Microsoft Power Platform, etc.
Software Asset Management Technical Specialist - Corporate IT Management Office, Corporate IT Supervisory Department (CITD)
RakutenThe Technology Management Division (TMD) provides Corporate IT, and Cyber Security & Privacy Governance to Rakuten Group companies and essential business management for technology organizations, thereby enabling innovation and strengthening the technology foundation. Within TMD, the Corporate IT Supervisory Department (CITD) drives Rakuten Group’s global corporate IT services and infrastructure. Our mission is to empower Rakuten through innovative and secure IT solutions that enhance efficiency and foster productivity. The Corporate IT Service Department (CITSD) empowers Rakuten through innovative and secure IT solutions that drive efficiency and enhance productivity. Our service scope encompasses enterprise application management for core business functions, driving business process automation and digital transformation through our IT platform, providing comprehensive end-user support and operations, and optimizing IT processes to support a range of essential services and platforms. As Rakuten Group strengthens its software governance, the importance of system-based usage controls and technical safeguards—beyond mere license management—is growing. We are seeking a Technical Specialist who can collaborate with the SAM team's operations staff to understand the technical specifications of software and SaaS products, and drive their implementation on IT platforms as well as the design of access controls. Evaluate technical capabilities and administrative controls of software products and SaaS platforms. Design technical governance controls to enforce software licensing and usage policies. Assess software deployment architectures, authentication mechanisms, and access control models. Support software onboarding reviews from a technical governance perspective. Manage and optimize software administration consoles and management platforms. Configure access control, role management, and policy enforcement settings. Collaborate with Enterprise IT teams to implement software restrictions and governance controls. Design integration requirements between software platforms and enterprise systems. Develop automated controls for software provisioning, deprovisioning, and license assignment. Support implementation of policy-based software management. Enhance compliance monitoring through automation and data-driven processes. Reduce manual operational effort through workflow optimization. Evaluate software from security, compliance, and operational perspectives. Review software architecture and enterprise deployment requirements. Collaborate with Information Security teams to assess software-related risks. Recommend technical mitigations and governance controls. Partner with SAM Operations teams to translate policy requirements into technical solutions. Collaborate with IT Infrastructure, Endpoint Management, Identity Management, Security, and Procurement teams. Support software vendors in technical discussions regarding product capabilities and governance requirements. Provide technical guidance to internal stakeholders and software owners.
Senior Network Engineer - Core Technologies Section, Corporate IT Infrastructure Department (CITID)
RakutenThe Technology Management Division (TMD) provides Corporate IT, and Cyber Security & Privacy Governance to Rakuten Group companies and essential business management for technology organizations, thereby enabling innovation and strengthening the technology foundation. Within TMD, the Corporate IT Supervisory Department (CITD) drives Rakuten Group’s global corporate IT services and infrastructure. Our mission is to empower Rakuten through innovative and secure IT solutions that enhance efficiency and foster productivity. The Corporate IT Infrastructure Department (CITID) provides the stable and reliable technological foundation that supports Rakuten's global business operations. We deliver simple, secure, and robust infrastructure services with operational and engineering excellence, managing core infrastructure, enterprise collaboration platforms, development support tools and project management. As RakutenGroup continues its rapid global expansion, we are modernizing our network architecture to embrace a "Cloud-First" and "Zero Trust" network model. We are looking for a Senior Network Engineer to support this transformation and ensure our global corporate network infrastructure remains agile, secure and highly available. You'll join a global team and will have a lot of chances to work for global projects as well as domestic projects. Your responsibilities will include: Design, verification, construction, operation and user support for overall network infrastructure, including Zero Trust network, wired/wireless LAN, Data Center and cloud network, WAN, remote access, authentication, firewall and load balancer. Propose and engage in selection process for new technology/product/design. Work for various projects with domestic or global infrastructure team. Mentor junior engineers, share troubleshooting/design best practices, and lead technical initiatives from conception through completion. Develop and maintain network architecture documentation, standards, best practices, configurations, procedures and diagrams. Act as the SME for complex network incidents: perform root cause analysis, implement fixes and proactively address performance bottlenecks and capacity constraints. Drive the transition from manual configuration to Infrastructure-as-Code (IaC).