Top Front End Developer Jobs in Tokyo

Develop and continuously improve frontend software for a MaaS product and Mobility Service Controller. Responsibilities include building reusable React and TypeScript components, integrating interfaces, defining UI specifications, testing for defects and edge cases, reviewing code and documentation, and improving usability, accessibility, performance, and error handling. The role collaborates with product, design, backend, business, mobility partners, and Toyota-related services to translate operational needs into scalable user experiences.

Design and build interfaces for HUD’s AI agent training, evaluation, and marketplace products. Translate complex reinforcement learning workflows, agent runs, evaluation results, reward signals, and quality feedback into clear, actionable experiences. Collaborate with users, researchers, and engineers to ship polished products, conduct user discovery, improve usability, and develop reusable interaction patterns.

Develop and operate web products including PayPay Securities mini-applications, PC trading sites, and internal business tools. Collaborate with product managers and designers to improve investment experiences, prototype new features, and implement redesigns. Improve unit testing, architecture, frontend performance, and CI/CD processes while contributing to a new engineering organization.

Develop web applications using React, design UI components, and create an efficient development framework. Collaborate with the team in product development.

This posting is a template and contains no concrete responsibilities. Likely this role is a leadership position bridging frontend engineering and business: defining frontend strategy, aligning product and engineering teams, managing stakeholders, and driving product growth at OKX. Specific duties, technologies, and qualifications are not provided in the description.

Lead and own frontend engineering across core crypto products (Trading, Web3, Payments). Drive technical design, delivery, cross-team alignment, AI-infused product decisions, security standards (private key protection, frontend attack prevention), hiring, and operational excellence for high-concurrency, high-availability consumer products.

As a Senior Frontend Engineer, you will contribute to the frontend architecture, develop dApps, implement state management, and collaborate cross-functionally.

The Senior Frontend Engineer will build and architect components of a workflow automation platform. They will handle UI problems, mentor engineers, and improve developer experiences while collaborating with design teams.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.