Hybrid Senior Frontend Engineer, ReactJS

at join.com

• Job title: Senior Frontend Engineer, ReactJS
• Job type: Full Time
• Experience level: Senior
• Salary: €70,000 - €85,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: Babel, Cypress, GraphQL, JavaScript, React, Redux, Selenium, TypeScript, Webpack
• Location requirements: Hybrid, Berlin, Germany

About the role

• Senior Frontend Engineer developing scalable features for recruiting software at JOIN. Collaborating with design and product teams to shape the user experience and technical architecture.

Responsibilities

• 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.