Senior JavaScript Engineer (React.js)

Requirements:Own the design and delivery of reliable frontend features across the Next.js application and shared packages. Collaborate closely with product, design, backend, and QA teams while helping the team make technical decisions.RequirementsSenior-level experience delivering production web applications, with 5+ years in frontend development.Strong experience with React, TypeScript, and modern Next.js, including App Router patterns and server/client rendering.Ability to design maintainable components and shared packages/APIs within a large monorepo.Experience integrating frontend applications with GraphQL and REST APIs, including generated types, loading and error states, and evolving backend contracts.Proficiency in responsive and accessible UI development using CSS Modules/SCSS, with the ability to work within an existing design system and follow design token conventions.Experience with frontend state management, such as Redux and React Context.Solid understanding of testing and quality practices, including Jest or Vitest, Testing Library, Storybook, and browser testing frameworks.Familiarity with monorepo tooling and CI quality gates, including linting, PR workflows, type checks, and builds.Strong debugging, code review, and written communication skills.Ability to take ownership of features through implementation, testing, release, and production follow-up.Experience using modern AI development tools to improve productivity, such as GitHub Copilot, Codex, or Claude Code.Responsibilities:Creating technical vision & documentationParticipate in architecture and design effortsCode review, code optimizationTechnical tasks implementation, design, refactoringCollaborate with other engineering teams to resolve dependencies and deliver high-quality software on time, etc