Senior Frontend Engineer - EC Expansion Development Department (ECEXD)
Core
Senior Frontend Engineer leading e-commerce platform expansion and new service launches for Rakuten's marketplace.
Role type
Senior Frontend Engineer (Team Lead)
Builds
High-traffic storefronts, order management, and inventory management systems for e-commerce.
Domain
E-commerce / Retail
Deliverable
production ML models | product features
Required skills
React (16+), TypeScript, Next.js (App Router), Modern JavaScript (ES6+), Tailwind CSS, Unit/Integration/E2E Testing, Git workflows, Technical Specification Writing, Stakeholder Coordination, Team Mentoring
Preferred skills
Agile/Scrum, RFC/Design Document creation, Project Management tools, E-commerce business models, Server-side React patterns (RSC, Streaming SSR), Design Systems, Web Accessibility (WCAG), Core Web Vitals, Error Monitoring, Internationalization (i18n), SEO, AI coding assistants
Technologies
Next.js 15, React 19, TypeScript, TanStack Query, Zustand, shadcn/ui, Tailwind CSS, Jest, React Testing Library, Playwright, Jira, Figma, Sentry, Datadog
Responsibilities
Define requirements and project scope with cross-functional teams; Design and implement end-to-end frontend systems; Build reusable, accessible, and performant React components; Conduct code reviews and mentor team members; Present technical proposals and progress reports; Take ownership of complex features and drive technical initiatives.
Seniority
Senior, hands-on IC with leadership responsibilities