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Frontend Tech Lead Driving Large‑Scale E‑Commerce UX
| Location | Tokyo - 23 Wards |
| Job Type | Temporary |
| Salary | 6 million yen ~ 8 million yen |
Job Description
This role leads the design, development, and optimization of frontend systems for a large-scale online marketplace used by tens of millions of users. You will combine hands-on engineering with technical leadership to deliver high-performance, reliable, and user-centric web experiences.
Client Details
Our client is a major consumer internet and e‑commerce platform in Japan, operating one of the country's largest online marketplaces. The organization delivers high-traffic digital services and continuously evolves its UI/UX and system performance to support large-scale campaigns and peak traffic events.
Description
- Understand business priorities and deliver high-quality frontend services within tight schedules
- Lead projects for assigned services, resolving technical challenges and guiding implementation
- Design, develop, test, and release new features as well as enhance existing functionality
- Maintain, monitor, and troubleshoot frontend services, including bug fixes and incident handling
- Drive system improvements such as refactoring, performance optimization, and architectural enhancements
- Evaluate and introduce appropriate technologies and frontend architectures
- Measure load and performance, and implement improvements for scalability and stability
- Produce clear documentation including design specifications and test cases
- Collaborate with global stakeholders using English in day-to-day communication
Job Offer
- Opportunity to lead frontend engineering for a mission‑critical, high‑traffic platform
- Technically challenging environment with real-world performance and scalability demands
- Collaboration with experienced engineers in a global, English-speaking context
- A role combining hands-on development with technical leadership and influence
To apply online please click the 'Apply' button below. For a confidential discussion about this role please contact Serena Wu on +81 3 6627 6137.
General Requirements
| Minimum Experience Level | No experience |
| Career Level | Mid Career |
| Minimum English Level | Fluent |
| Minimum Japanese Level | Basic |
| Minimum Education Level | Bachelor's Degree |
| Visa Status | Permission to work in Japan required |
Required Skills
Required Skills & Experience
- 5+ years of frontend development using HTML, CSS, and JavaScript
- 5+ years of frontend development using React, Redux, and TypeScript
- Experience developing and maintaining unit tests, E2E tests, and integration tests
- Hands-on experience with JavaScript testing frameworks (e.g. Jest, Intern, WDIO)
- Strong coding and code review skills with a focus on performance, maintainability, and security
- Experience consuming Web APIs (REST, JSON, CORS)
- Understanding of parallel and asynchronous processing (AJAX, Promise, WebWorkers, WebSockets)
- Investigation and operational experience in Linux environments
- Experience with software configuration management (Git, Jenkins, etc.)
- DevOps and system operation experience including analysis and remediation
- Strong documentation skills (design documents, test cases, specifications)
- Business-level English communication skills
- Proactive mindset with the ability to identify issues and drive solutions independently
- 3+ years of development team leadership, project leadership, or tech lead experience
- Ability to design frontend architecture from scratch
- Experience with Agile development methodologies
- Experience using ESLint
- Exposure to public cloud environments (e.g. GCP)
- Interest in leveraging AI technologies to improve development processes and services
Job Location
- Tokyo - 23 Wards
Work Conditions
| Job Type | Temporary |
| Salary | 6 million yen ~ 8 million yen |
| Industry | Software |
