Our client is a leading e-commerce marketplace platform in Japan, offering one of the largest online shopping experiences in the country. They provide a platform that connects millions of shoppers with thousands of merchants, focusing on high-quality user experience, scalability, and innovation in online commerce.
We are looking for a proactive Frontend Engineer with experience in JavaScript, HTML, CSS, and React/Node.js, strong skills in performance, architecture, testing, and security, who can collaborate effectively, take ownership, and drive solutions for a large-scale e-commerce platform.
Responsibilities
Defined requirements, designed, developed, tested, and deployed frontend features for a large-scale e-commerce platform
Collaborated with product managers, backend engineers, and cross-functional teams
Monitored system stability and performance, and implemented performance optimizations
Improved frontend architecture through refactoring and code optimization
Troubleshot production issues and ensured high system reliability
Technologies
JavaScript, HTML, CSS
React.js / Node.js
Git
Unit testing (Jest or similar frameworks)
Key Skills
Frontend performance optimization
Web security best practices
System design and architecture
Unit and integration testing
Collaboration in an international engineering environment
Qualifications
Job Level
· Senior (approximately 7+ years of professional experience or equivalent skills)
Mandatory Qualifications:
- Development experience with JS, HTML, CSS for more than 3 years
- Development experience with React.js or Node.js
- Deep understanding of frontend performance optimization
- Knowledge of Web security
- Experience of system design
- Experience of testing (Unit Test, Integration Test)
- Communication skill in English
Desired Qualifications:
- Experience with ESLint
- Experience with unit testing implementation in JavaScript (Jest, Intern, WDIO)
- Ability to design front-end architecture
- DevOps experience
- Experience of Git
- Always act in active way and lead to the solution
Languages
English: Fluent
Japanese: Optional / a plus
Work Environment
Fast-paced, dynamic global environment with collaborative teams across multiple locations
Salary: ¥6.5M – ¥11M JPY per year
Location: Hybrid (4 days in the office, 1 day remote)
Office Location: Tokyo, Japan
Working Hours: Flexible schedule with core hours from 11:00 AM to 3:00 PM
Visa Sponsorship: Available
Language Requirement: English only
Apply now or contact us for further information: 連絡先情報を表示