
Senior Frontend Engineer, ReactJS
join.com
full-time
Posted on:
Location Type: Hybrid
Location: Berlin • Germany
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Salary
💰 €70,000 - €85,000 per year
Job Level
About the role
- Own frontend feature delivery end-to-end – from technical discovery and solution design to implementation, testing, rollout, and monitoring in production.
- Translate product requirements into scalable technical solutions, proactively identifying edge cases, UX trade-offs, and performance implications before implementation begins.
- Build complex, maintainable React components and application flows using TypeScript and modern frontend architecture principles.
- Drive technical quality within your scope by writing robust unit, and end-to-end tests and ensuring high reliability of shipped features.
- Actively contribute to architectural discussions, proposing improvements to frontend structure, state management patterns, performance optimisation, and scalability.
- Collaborate closely with Product and Design during discovery, challenging assumptions and ensuring solutions balance user experience, feasibility, and speed.
- Monitor and optimise performance and user experience in production, using metrics, logs, and analytics to continuously improve feature impact.
- Support incremental improvements to the Design System and shared components when feature development requires enhancements.
- Mentor less experienced engineers through collaboration and knowledge sharing (without formal people management responsibilities).
Requirements
- 5+ years of frontend development experience using frameworks and UI libraries
- 2+ years of development experience in React.js and Redux
- 2+ years of experience with TypeScript
- 2+ years of experience with GraphQL
- Nice to have: Experience with JS/TS linters, webpack, babel, or other bundle/configuration management
- Experience with Cypress, Selenium or other E2E frameworks
- Experience building Design System components using Storybook or other frameworks
- Experience building Monorepo apps
Benefits
- Apple hardware – The best tools for the job (M3 Pro MacBook Pro).
- Team events – Brunches, sports activities, and quarterly gatherings in Berlin.
- Productivity from Everywhere – 104 days per year remote (post-probation), following our hybrid policy.
- Competitive salary – Tailored to align with your experience level.
- Relocation support – Assistance with paperwork, travel, and one month of furnished accommodation.
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
frontend developmentReact.jsReduxTypeScriptGraphQLunit testingend-to-end testingperformance optimisationDesign System componentsMonorepo apps
Soft Skills
collaborationmentoringproblem-solvingcommunicationcritical thinking