Frontend Developer

Compensation: ¥7M – ¥11M JPY per yearEmployment Type: Full-timeExperience Level: Middle, SeniorAbout the RoleOur 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, strong skills in performance, architecture, testing, and security, who can collaborate effectively, take ownership, and drive solutions for a large-scale e-commerce platform.ResponsibilitiesDefined requirements, designed, developed, tested, and deployed frontend features for a large-scale e-commerce platformCollaborated with product managers, backend engineers, and cross-functional teamsMonitored system stability and performance, and implemented performance optimizationsImproved frontend architecture through refactoring and code optimizationTroubleshot production issues and ensured high system reliabilityTechnologiesJavaScript, HTML, CSSReact.js / Node.jsGitUnit testing (Jest or similar frameworks)Key SkillsFrontend performance optimizationWeb security best practicesSystem design and architectureUnit and integration testingCollaboration in an international engineering environmentMandatory Qualifications:- Development experience with JS, HTML, CSS for more than 5 years (Ideally 7+ years of experience)- Strong hands-on development experience with React.js; experience with Node.js is a plus- Development experience with Java- Deep understanding of frontend performance optimization- Knowledge of Web security- Experience of system design- Experience of testing (Unit Test, Integration Test)- Communication skill in EnglishDesired 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 solutionLanguage RequirementsEnglish: FluentJapanese: OptionalWork EnvironmentFlexible working hours with core collaboration hoursInternational engineering teamHybrid PositionApply now or contact us for further information:TG Japan Inc.03-5775-6618RSU1_Agt@tg-hr.com