Jobs in Tokyo
Tokyo is the heart of Japan's job market and home to its most international workplaces. Browse roles across every industry from global startups to established enterprises, many offering visa sponsorship and English-speaking environments.
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Refine with filters →Applied AI Engineer, Codex
OpenAIOpenAI’s Applied AI Engineering team helps organizations turn frontier AI capabilities into safe, reliable, and high-impact production systems. For software engineering organizations, this means helping customers adopt Codex and other OpenAI capabilities across the software development lifecycle—transforming how teams plan, build, test, review, and deliver software. We work directly with engineering leaders and hands-on developers to identify high-value opportunities, design and implement AI-powered development workflows, and scale what works across engineering organizations. We turn lessons from these deployments into better products, reusable architectures, and technical patterns that help developers everywhere get more value from Codex. As an Applied AI Engineer focused on Codex, you will partner directly with leading engineering organizations to design, build, and deploy AI systems that transform how software is developed. You will combine deep technical judgment, hands-on engineering, and customer leadership to take ambitious ideas from workflow and use-case selection through prototyping, evaluation, production rollout, and scaled adoption. You will work alongside engineering teams to build advanced AI coding workflows, integrations, automations, and evaluation systems—often using Codex itself as part of your development process. You will help customers make technical decisions involving model behavior, agentic workflows, developer environments, security, reliability, evaluation, and operational readiness, while ensuring deployments translate into measurable improvements in engineering productivity and software delivery. You will work closely with OpenAI Product, Research, Engineering, Security, Sales, and the broader Codex organization, translating real-world deployment experience into high-signal product and model feedback. Success is measured by production systems, sustained developer adoption, and meaningful improvements to how engineering organizations build software—not simply successful demonstrations or enablement activity. This role is based in Tokyo, Japan. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees. In this role, you will: Partner directly with engineering leaders and hands-on developers to identify high-value opportunities for Codex and translate them into technical architectures, implementation plans, evaluation strategies, and measurable success criteria. Design, build, and deploy AI-powered software development workflows that improve how engineering teams plan, write, test, review, debug, and deliver software. Work hands-on in code to build prototypes, evaluation harnesses, reference implementations, integrations, workflow automations, and production accelerators—often using Codex as part of your own development process. Help customers progress from promising experiments to reliable production workflows, sustained developer adoption, and scaled impact across engineering organizations. Design systematic approaches for evaluating AI coding systems using representative software engineering tasks, automated graders, production signals, and developer feedback. Make sound technical decisions across models, agents, tools, developer environments, integrations, reliability, observability, latency, cost, safety, security, and operational readiness. Diagnose complex implementation challenges, reproduce failures, test hypotheses, and drive technical blockers toward resolution. Lead technical deep dives, workshops, and hands-on enablement that help engineering teams understand and adopt advanced AI coding workflows effectively and safely. Gather high-fidelity insights from real-world Codex deployments and translate them into clear product proposals, model feedback, and technical requirements for OpenAI Product, Research, and Engineering teams. Create reusable architectures, tooling, examples, guides, and technical patterns—including contributions to resources such as the OpenAI Cookbook—that accelerate future Codex deployments. Influence customer engineering strategy by helping technical leaders understand how AI coding systems can reshape their software development lifecycle, engineering practices, and organizational workflows.
Vehicle Testing Engineer, AD/ADAS Application
Woven by ToyotaThe AD/ADAS Application team develops vehicle control functions for autonomous driving systems, as well as map information services. The mission of test engineers is to establish and evaluate criteria for the functionality, performance, and quality of software implemented based on system requirements, and to provide feedback to designers to improve product performance and quality. Furthermore, we aim to integrate these products into Toyota’s next-generation driver assistance systems, “Toyota Safety Sense” and “Teammate,” thereby providing customers around the world with safer driving and a more comfortable mobility experience. We are looking for an engineer who can manage, analyze, and oversee issues identified during AD/ADAS vehicle evaluations to improve software performance and quality. Candidates who can propose new values and communicate effectively while building strong relationships with software engineers, test drivers, and various other stakeholders are also welcome. In addition to regularly commuting to our office in Nihonbashi, Tokyo, you will conduct real-vehicle testing at the Test Course in Shizuoka.
Cloud Engineer
Woven by ToyotaThe mission of the Cloud and AI Engineering is to increase productivity and accelerate delivery of software and services for both Woven by Toyota and the larger Toyota organization as a whole. We do this by building and integrating best of breed cutting-edge technologies to help engineering teams go faster, while emphasizing safety. By providing modern, agile and transparent services to our customers, we aim to realize Woven by Toyota’s vision of ”Mobility to Love, Safety to Live”. We are looking for a Cloud Engineer with deep experience in Cloud Governance, infrastructure, and DevOps. You will help ensure our services and infrastructure are designed, operated, and continuously improved to the highest standards of security, reliability, and cost efficiency. The ideal candidate is knowledgeable and passionate about secure technology infrastructure, automation, data-driven continuous improvement, and modern software development, and brings a strong customer-first mindset to everything they do.
Business Operations Support Assistant
Woven by ToyotaAs a member of the Business Operations Support Team within the Accessibility Office, this role supports organizational operations by collaborating with various teams across Woven by Toyota. Through a wide range of responsibilities, including information management, inquiry handling, administrative processes, and content management, the role helps ensure smooth internal operations across the organization. The Accessibility Office welcomes individuals with diverse backgrounds and experiences. We provide an environment where employees can build their careers while gradually expanding their responsibilities based on their individual experience, skills, and strengths.
Principle Product Manager, Rakuten Ecosystem Platform Services - Ecosystem Platform Supervisory Department (EPSD)
RakutenThe Technology Platforms Division (TPD) drives the growth of Rakuten's ecosystem by delivering innovative, high-quality technology platforms characterized by integrated control and strategic partnerships. Within TPD, the Ecosystem Platform Supervisory Department (EPSD) develops scalable and reliable platforms that support the entire Rakuten Ecosystem globally, fostering a culture of ownership and data-driven decision-making. As a Senior Product Manager within Rakuten Ecosystem Platform Services, you will be responsible for leading the strategy and execution of platform services that accelerate the business growth of Rakuten Group companies and external partners. Based on a deep understanding of the market and customer needs, you will contribute to the further development of the Rakuten Ecosystem by bringing innovative products to life. Key Responsibilities include conducting in-depth analysis of market trends, competitor activities, user needs, technology trends, and challenges within the Rakuten Ecosystem to identify new platform service opportunities and formulate business strategies; defining product vision, mission, KGI/KPIs, and developing long-term product roadmaps; leading consensus building on strategies by collaborating with diverse stakeholders; planning specific service functionalities, defining use cases, and articulating detailed requirements; emphasizing user experience (UX) and proposing UI/UX improvements based on data; designing solutions that balance technical feasibility with business impact; working closely with development teams, exercising strong product ownership within an agile development process; managing development progress, identifying and resolving issues, and mitigating risks; analyzing and evaluating the performance of released products based on KGI/KPIs; proposing and implementing continuous improvements based on user feedback and data analysis; and ensuring strict adherence to legal, security, privacy, and brand guidelines.
Project Manager (Operation Kaizen) - Service Operation Department, Product Development Division, Rakuten Payment, Inc. (Secondment)
RakutenThe Rakuten Group’s core management philosophy is to "empower people and society through innovation." With a user base of over 100 million in Japan (and over 1 billion globally), we provide more than 70 diverse services—ranging from e-commerce platforms like our online marketplace and travel booking sites, to financial services such as online banking, media services, and professional sports. By covering a wide spectrum of life scenes and organically linking our various services, we have built a robust business model known as the "Rakuten Ecosystem." Within this framework, Rakuten Payment, Inc., as a member of the Rakuten Group’s FinTech group, develops businesses centered on payment services—including "Rakuten Pay," "Rakuten Point Card," "Rakuten Edy," and "Rakuten Check"—as well as marketing solutions. With the power of technology, we aim to create a world where anyone can enjoy the same value no matter where they are. As the digital landscape of society rapidly expands, we aim to connect the online and offline worlds more seamlessly, enabling everyone to lead their daily lives with safety, security, and greater convenience through the power of technology. Striving for such a society, we are committed to addressing the diverse challenges faced by all people and walking together toward the next stage of innovation. The Operations Improvement Group is an organization where "improvement does not end with a proposal: you take ownership to drive the initiative and measure the actual results." We welcome candidates who are committed to "seeing improvement projects through to completion within a single organization" and who are driven by a desire to "track success through tangible outcomes."
Procurement Specialist, Facility/Service Procurement Group
ShiseidoIn line with our mid-term management strategy to achieve a core operating profit margin of over 10% by 2030, we are tasked with a 3% cost reduction compared to projections for 2026. The main driver of this initiative is the enhancement of indirect material procurement, and we are promoting a transformation of the company-wide indirect material procurement process. Our group is advancing structural cost optimization through thorough sourcing and enhanced negotiation of all indirect costs in the facility area (office management, cafeteria operations, security, cleaning, electricity, etc.) and service area (outsourcing, consulting, marketing, travel, etc.). In this position, you will drive sourcing for expenditures in the facility and service areas, leading to increased engagement and cost optimization. You will particularly challenge the enhancement of procurement functions and expansion of engagement in the marketing area, which is a recent issue, demonstrating advanced expertise and vendor negotiation skills to contribute to the overall improvement of the company's profit margin.
Infra Development Group Manager - System Infrastructure Department, Information Systems Division, Rakuten Life Insurance Co., Ltd. (Secondment)
RakutenThe Rakuten Insurance Group continues to grow steadily, aiming to become the next pillar of Rakuten's FinTech business, following Rakuten Card, Rakuten Bank, and Rakuten Securities. Rakuten Life Insurance is one of the core businesses within the Rakuten Insurance Group. It offers a variety of insurance products, including simple term and whole life insurance, medical insurance, cancer insurance, dementia insurance, comprehensive insurance for younger generations, and group credit life insurance for housing loans. The company provides multiple proposal channels, such as face-to-face agency channels operating nationwide and internet channels that leverage the extensive Rakuten membership base. As a familiar and approachable life insurance company, and as an innovative life insurance provider utilizing the technological expertise of the Rakuten Group, Rakuten Life Insurance aims to deliver groundbreaking insurance solutions. We are building the infrastructure for Rakuten Life Insurance's services. This is a crucial position that supports the foundation of Rakuten Life Insurance, using new technologies to prepare the necessary environment for applications to run, creating an environment where business divisions can work more easily, and improving Rakuten Life Insurance's services. This role focuses on building the system infrastructure that supports Rakuten Life Insurance’s services. You will design and implement server platforms that form the foundation of systems closely connected to insurance operations. By working closely with both internal teams and other departments, you will gain a broad understanding of how an insurance company’s systems work as a whole. To strengthen the organization in order to promote in-house infrastructure capabilities and improve stability and quality. You will primarily be responsible for serving as the Group Leader of the System Infrastructure Development Group at Rakuten Life Insurance Co., Ltd. You will oversee and manage the server infrastructure group, including the following responsibilities: Design, construction, operation, and maintenance of system infrastructure such as servers. Driving and managing infrastructure-related projects, including planning and execution. Incident and failure response related to system infrastructure. Promote continuous team improvement by applying the PDCA cycle in daily operations and addressing operational challenges proactively. The System Infrastructure Department consists of three groups: System Infrastructure Development Group, System Operation Group, Network Management Group. You are slated to be assigned to System Infrastructure Development Group. Mostly career professional. Oracle, SQL Server, MySQL. Windows Server, Linux Server.
Procurement Specialist, IT Procurement Group
ShiseidoIn line with our mid-term management strategy to achieve a core operating profit margin of over 10% by 2030, we are tasked with a 3% cost reduction compared to projections for 2026. The main driver of this initiative is the enhancement of indirect material procurement. In this position, you will promote sourcing for IT expenditures, including hardware, software, SaaS, telecommunications, and IT services and operations, leading to an expanded engagement rate and structural cost optimization. You will play a crucial role by demonstrating advanced expertise and vendor negotiation skills, directly contributing to the strengthening of the company's revenue base and improving profit margins through early cost reduction results.
Infra Operation Group Manager - System Infrastructure Department, Information Systems Division, Rakuten Life Insurance Co., Ltd. (Secondment)
RakutenThe Rakuten Insurance Group continues to grow steadily, aiming to become the next pillar of Rakuten's FinTech business, following Rakuten Card, Rakuten Bank, and Rakuten Securities. Rakuten Life Insurance is one of the core businesses within the Rakuten Insurance Group. It offers a variety of insurance products, including simple term and whole life insurance, medical insurance, cancer insurance, dementia insurance, comprehensive insurance for younger generations, and group credit life insurance for housing loans. The company provides multiple proposal channels, such as face-to-face agency channels operating nationwide and internet channels that leverage the extensive Rakuten membership base. As a familiar and approachable life insurance company, and as an innovative life insurance provider utilizing the technological expertise of the Rakuten Group, Rakuten Life Insurance aims to deliver groundbreaking insurance solutions. Examples of Initiatives: Launch of Rakuten Points rewards for policyholders: Link (opens in new window) Digital transformation of insurance underwriting operations using AI: Link (opens in new window) We are building the infrastructure for Rakuten Life Insurance's services. This is a crucial position that supports the foundation of Rakuten Life Insurance, using new technologies to prepare the necessary environment for applications to run, creating an environment where business divisions can work more easily, and improving Rakuten Life Insurance's services. We will support the Infrastructure of Rakuten Life Insurance. You will handle daily system operations for applications tightly integrated with insurance business processes, while collaborating with development teams across the Information Systems Division to gain a broad view of the company’s systems. Attractive Points: AI-Driven Innovation: Leverage Rakuten Group's strong AI drive to implement innovative proposals with cutting-edge AI technology. Strategic Influence: Our compact financial organization offers a unique opportunity to work closely with management strategy, directly linking IT strategy to company growth. Broad Impact & Growth: Our size ensures ample chances to take on diverse responsibilities and projects, fostering extensive professional growth. To strengthen the organization with the aim of promoting in-house operations and improving quality. You will primarily be responsible for serving as the Group Leader of the Operations Group at a Rakuten Group insurance company. You will oversee and manage the following teams within the operations group: Help Desk/Account Team (Handling inquiries from business departments, access and privilege management, PC setup and provisioning, etc.) Release Management Team (Planning and coordinating releases to production and other environments, etc.) Operations Team (Batch and job management, release execution, incident response, and other production environment maintenance tasks) Data Processing Team (Data extraction and update operations in the production environment) Drive continuous improvement of team performance and operations by applying the PDCA cycle in daily activities. System Infrastructure Department Total: 40 Employees: 14 Contractors: 26 The System Infrastructure Department consists of three groups: the Infrastructure Construction Group, the Operations Group, and the Network Management Group. You are slated to be assigned to System Operation Group. Mostly career professional Oracle, SQL Server, MySQL Windows Server, Linux Server.