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.

Build high-performance, responsive frontend applications for Binance Earn across desktop and mobile. Collaborate with design, backend, and product teams to translate requirements into reusable, maintainable solutions. Develop frontend libraries and frameworks, optimize performance and scalability, and apply React, JavaScript, TypeScript, state management, and modern build tools. Web3, on-chain trading, ethers.js, web3.js, and real-time data platform experience are advantageous.

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.

Lead the architecture, development, and delivery of frontend applications for convenience-store robotics operations. Build React and TypeScript features, integrate REST and gRPC services, establish scalable frontend practices, and support WebView-based platforms. Mentor two frontend engineers through hands-on coding, reviews, and pair programming. Partner with business, design, backend, robotics, and operations teams while improving observability, reliability, CI/CD, and incident response.

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 Frontend Engineer, you'll develop responsive web applications, collaborate with cross-functional teams, and mentor junior developers while optimizing applications for performance.

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.

Design and build responsive React frontends, implement wallet and blockchain interactions, translate complex DeFi/financial data into institutional dashboards, collaborate with smart contract and legal teams, ensure performance, security, and accessibility, and maintain clean, documented code through code reviews.

Develop and maintain Java backend services for blockchain applications; integrate APIs with React/Vue frontends; design and optimize scalable enterprise blockchain solutions; troubleshoot backend issues; collaborate with cross-functional teams and stay current with blockchain best practices.