Jobs in Japan
Explore hand-picked jobs in Japan for English speakers across tech, education, marketing, and more.
Vetted companies only. Apply from overseas.
Jobs in Japan
Explore hand-picked jobs in Japan for English speakers across tech, education, marketing, and more.
Vetted companies only. Apply from overseas.
666 jobs in Japan open to English speakers, updated 25 October 2026.
Explore hand-picked jobs in Japan for English speakers across tech, education, marketing, and more.
Vetted companies only. Apply from overseas.
17 open jobs
MercariAs an intern on Mercari’s Security Engineering team, you will work on security design and process reviews, building and deploying security measures, penetration testing, and other initiatives. Mercari security engineers have a unique role within the company, working on projects that affect the entire organization. You will have the opportunity to engage with the topics below and take responsibility for one area of work of your choice: monitoring and log analysis, development of logging infrastructure, conducting security reviews and creating threat models, designing and implementing security automation and dashboards, security testing of web and mobile applications, or technical project management. Under the guidance of senior engineers, you will participate in threat modeling, code reviews, and security testing to identify and mitigate risks in Mercari’s systems. You will develop and improve scripts to automate common security tasks, such as compliance checks, asset inventory reconciliation, and alert operations. You will conduct security research on specific topics, such as AI system security and supply chain risks, summarize key findings, and propose actionable improvements. You will support the vulnerability management process by triaging and validating security findings and coordinating remediation with developers. You will contribute to creating and updating internal documentation, including secure development guidelines, AI security best practices, security playbooks, and onboarding materials for engineers. You will support security monitoring activities, including log analysis, tuning detection rules, and tracking misconfigurations and policy violations.
PaypayAs a Senior Data Scientist in PayPay Credit Modeling, you will lead work that improves credit risk and financial decisions. You will lead modeling initiatives from identifying opportunities and framing ambiguous business problems through developing models, designing credible evaluations, and assessing real-world impact. You will collaborate closely with product, risk, data engineering, and machine learning engineering teams to translate research into reliable, scalable solutions. This is a role with scope to shape the technical direction of modeling and analysis, coach colleagues, and influence decisions across PayPay. Responsibilities include owning the scientific approach to modeling work, from defining the decision and expected value through baselines, validation, and a clear recommendation; developing and evaluating models and features using large, varied datasets and choosing methods that fit the problem and can be explained, validated, and maintained; setting evaluation standards for how models will be used, challenging assumptions, detecting leakage and selection bias, accounting for delayed outcomes, and using appropriate baselines, time-aware tests, and calibration to judge whether results are reliable; estimating likely effects on revenue, credit losses, exposure, portfolio quality, and customer outcomes, and making assumptions and uncertainty clear; guiding promising models through production with data and machine learning engineers, defining model and feature requirements, validating deployed behavior, monitoring performance and outcomes, and recommending changes based on evidence; communicating findings and trade-offs to technical and non-technical stakeholders and helping teams decide whether to proceed, change course, or stop; and leading technical discussions, critically reviewing modeling approaches, mentoring other data scientists, and establishing reusable practices that improve the team's work. Ways of working include taking ownership of ambiguous questions and bringing structure to the work needed to answer them; challenging assumptions constructively and revising your view when the evidence changes; balancing speed with rigor, explainability, and the ability to maintain what you build; and communicating trade-offs and decisions clearly to partners with different expertise and priorities.
iSpaceAt ispace, we believe in empowering the next generation of innovators. Our internship program offers a unique opportunity to work alongside world-class engineers on real projects that contribute to our mission of expanding humanity’s presence in space. ispace interns work across teams in R&D/Engineering, Business, IT, Legal and Finance to tackle challenges, collaborate on solutions, and drive impactful change for our clients and users. Along the way, you’ll gain valuable skills and lay the foundation for your career. Our program is highly specialized—we do not offer “general internships.” Interns become an integral part of the team, working on actual projects and learning directly from experienced professionals. To succeed, candidates must possess the technical skills required for the role they apply for. Engineering roles include Design, Mission Operations, and Production/AIT. Various corporate roles are also available. Internships can start at any time and the length of the internship also varies. Part time internships are available, but our preference is for longer term (6 months or more) and full time. The position is based at the Tokyo office; remote internships are not available. English or Japanese language ability is mandatory.
RakutenDepartment Overview As Japan’s largest online shopping mall service used by tens of millions of consumers, we continuously strive for improvement through a cycle of hypothesis formulation, verification, analysis, and systemization. During large-scale events such as Rakuten Super Sale, we also optimize our web backend systems by taking into account various system and service characteristics to ensure continuous and stable service under high-load conditions. This environment provides engineers with constant opportunities to test and demonstrate their technical skills. Position: Why We Hire We are currently seeking Senior Backend Engineers for the Rakuten Ichiba platform. The role involves the design, development, and operation of web system backends, as well as engineering team leadership and project management responsibilities. Position Details ・ Understand business requirements, and deliver features with high quality and speed ・ Leading project or leading team as senior engineer from design, develop, test, and operate new user-facing features for large scale e-commerce systems , make technical decision under complex circumstance ・ System design, implementation, testing and release for various types of development projects ・ Operations (Inquiry management, investigation and other operational tasks)
AnthropicAs a Partners Solutions Architect on the Applied AI team at Anthropic, you will be a Pre-Sales architect focused on cultivating technical relationships with our Global and Regional System Integrators (GSIs/RSIs), and our cloud partners (AWS and GCP). You will strengthen our relationships with key partners to accelerate indirect revenue, enable their AI practices, and execute on long-term GTM strategy. **Key Responsibilities**: - **Strategic Technical Partnership**: Be a technical thought partner to the Anthropic GTM partnerships team, providing technical expertise to better understand the partner landscape, driving key strategic programs, and identifying opportunities to deepen partner technical capabilities. Embed with GSI and cloud partner technical teams to enable their AI practices, support troubleshooting, evangelize Anthropic in their developer communities, and serve as an escalation point for complex technical issues. - **Joint Solution Development:** Collaborate with partners to identify high value industry-specific GenAI applications, develop joint solutions and codify reference architectures / best practices to accelerate time to deployment - **Customer Deal Support:** Intervene directly to unblock strategic customer deals where partners are the primary delivery vehicle, providing deep technical expertise and solution architecture guidance. - **Partner Ecosystem & Events**: Represent Anthropic at partner events such as GSI customer workshops, AWS summits, and industry conferences. Lead or support partner-specific developer events, hackathons, and technical enablement sessions, especially for technically native communities. - **Product Feedback:** Validate and gather feedback on Anthropic's products and offerings, especially as they relate to partner use cases and deployment patterns, and deliver this feedback to relevant Anthropic teams to inform product roadmap and partner strategy.
PaypayWe are seeking a highly skilled and experienced Platform Engineer to manage and enhance our end-to-end application delivery platform, from CloudFront to the underlying EKS clusters. Moving beyond standard maintenance, this role combines production infrastructure ownership with software engineering. You will build and scale robust in-house platform tools, develop custom Kubernetes controllers, and automate complex workflows safely. The ideal candidate will have a strong foundation across cloud infrastructure, networking, Kubernetes, and service mesh technologies, with deep expertise in at least one of these areas. The candidate will also have production experience in Python or Go and the versatility to become productive in the other. We particularly value engineers who can quickly understand unfamiliar systems, capable of using AI-assisted development effectively while remaining accountable for production stability, code maintainability, and operational safety. In this role, you will play a pivotal part in raising our engineering velocity and defining the reliability standards of our platform.
RakutenEC Marketplace Development Department (ECMPD) is a tech division under Rakuten Commerce & Marketing Company of Rakuten Group, Inc. We are responsible for developing and enhancing our online system to support our core business, Rakuten Ichiba. Rakuten Ichiba is one of the largest internet shopping malls in Japan with 5.6 trillion sales in 2022 and our business is growing year on year. We aim to provide the best shopping entertainment for our shoppers and empower our partners in Rakuten Ichiba. While this service is growing steadily, we need a more robust and scalable system to drive further growth. We are also committed to providing the best user experience possible. This requires a stronger team and higher engineering skills, and we need more experienced Engineer to work with us as part of our development team. Lead system software development team as a Senior Engineer for development/operational product of navigation services in Rakuten Ichiba. Project planning (Create milestone, system delivery and development budget). Project management (Progress management, Reporting and Issue management). Communication with stakeholders (Negotiation with other teams, and scheduling). QA management (Arrangement with QA team, Define QA scope, Scheduling).