Hybrid Senior Frontend Engineer – ReactJS

at join.com

• Job title: Senior Frontend Engineer – ReactJS
• Job type: Full Time
• Experience level: Senior
• Salary: €67,000 - €80,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: Cypress, GraphQL, JavaScript, React, TypeScript
• Location requirements: Hybrid, Barcelona, Spain

About the role

• Senior Frontend Engineer developing impactful features for JOIN's recruitment platform. Collaborating with Product and Design to optimize user experience and maintain code quality.

Responsibilities

• You’ll own features end-to-end — from discovery through to production monitoring: Ship high-impact features.
• You’ll take a product requirement, poke holes in it with Product and Design during discovery, architect the solution, build it in React + TypeScript, test it with Playwright and Cypress, and monitor it after launch.
• You’ll flag edge cases and UX trade-offs before they become problems.
• You’ll contribute to architectural decisions — state management patterns, performance optimization, scalability.
• You’ll write and advocate for TEPs (Technical Execution Plans) when changes need broader alignment.
• You’ll write robust unit and E2E tests because we take stability seriously — if it ships, it works.
• When your feature work surfaces gaps, you’ll improve shared components so the whole team benefits.
• You’ll contribute to our culture of knowledge sharing through pairing, code review, and knowledge sharing day-to-day collaboration — not through formal management, but through the work itself.

Requirements

• 6+ years building production frontends with modern JavaScript frameworks (React strongly preferred)
• Deep comfort with TypeScript, HTML5, and CSS3
• Solid experience with state management (Zustand or equivalent)
• Hands-on with API integration — REST, GraphQL, or both
• Experience writing meaningful tests (unit and E2E)
• Familiarity with CI/CD and Git workflows
• Track record of working in cross-functional Agile teams — you collaborate with Product and Design, not just other engineers
• Strong opinions on performance and usability — backed by data when possible.
• Experience building or maintaining a Design System (even better)
• Comfort working in Figma alongside designers (even better)
• Exposure to backend concepts or full-stack environments (even better).

Benefits

• Apple hardware – The best tools for the job (MacBook).
• Private health insurance — because it shouldn’t be a worry.
• Team events – Brunches, sports activities, and quarterly gatherings in Berlin.
• Productivity from Everywhere – 104 days per year remote (post-probation), following our hybrid policy.
• Relocation support – Assistance with paperwork, travel, and one month of furnished accommodation.