[English Okay!] Senior Front-End Engineer

Client Details

Description

• Act as a core project member for new and existing front-end features, covering design, development, testing, and release
• Lead technical decision-making for high-traffic web systems, including architecture and performance optimization
• Translate UI/UX designs and wireframes into high-quality, maintainable front-end code
• Monitor production services, troubleshoot issues, and drive root-cause analysis and improvements
• Refactor existing systems and introduce appropriate technologies, architectures, and tooling
• Collaborate with designers, backend engineers, and stakeholders across teams

Job Offer

• Long-term contract opportunity with stable renewals
• Exposure to one of Japan's largest consumer-facing digital platforms
• Highly challenging technical environment with real-scale performance demands
• Opportunity to influence architecture, tooling, and engineering standards
• Collaborative, international engineering team

To apply online please click the 'Apply' button below. For a confidential discussion about this role please contact Hikari Takamura on +813 6832 8903.

• Proven experience of technical lead experience on high-traffic web systems
• Front-end development using HTML, CSS, and JavaScript
• Experience with React, Redux, and TypeScript
• Strong experience designing front-end architecture from scratch (components, state management, performance, UX, CDN usage)
• Hands-on experience with unit testing, integration testing, and E2E testing
• Proficiency with JavaScript testing frameworks (e.g., Jest, WDIO, Intern)
• Solid understanding of asynchronous and parallel processing (AJAX, Promises, Web Workers, WebSockets)
• Experience with Web APIs (REST, JSON, CORS)
• Working knowledge of Linux operations and investigation
• Experience with Git-based version control and CI/CD tools (e.g., Jenkins)