Salary: 45.000 - 70.000 € per year Requirements: Good hands-on experience with React, TypeScript, and modern frontend frameworks (Next.js App Router, Vite) Some backend experience with Node.js and comfortable working across the full stack Familiarity with testing frameworks (Vitest, Jest, React Testing Library) Active use of AI coding tools like Claude, GitHub Copilot, or OpenAI Codex Open to feedback, enjoy learning, and continuously look for ways to improve your work Code writing with maintainability in mind and care for doing things the right way Clear communication, teamwork, and ownership of tasks Responsibilities: Maintain and further develop two large React applications (Next.js & Vite) as well as backend services Build new features across the full stack with clean, readable, and maintainable TypeScript code Write and maintain unit and integration tests using Vitest, Jest, and React Testing Library Collaborate closely with designers, backend developers, and product managers to deliver high-quality solutions Actively use AI-assisted development tools (e.g., Claude, GitHub Copilot, Codex) as a core part of your daily workflow to write better code faster Optimize frontend performance and contribute to backend reliability and API design Technologies: AI API Backend Copilot Frontend GitHub Jest React TypeScript NodeJS JavaScript Network Fullstack More: The TENHIL Group offers award-winning solutions for online recruiting, including high-reach job boards in Germany and Austria as well as SaaS portal solutions for partner websites. Were a growing team that values good collaboration, modern tooling, and shipping great products. We provide stability with a permanent contract after a 6-month probationary period, flexibility to work from home 2-3 days per week, and various office perks. Our benefits also include a Wellpass membership for access to gyms and pools, monthly employee benefits tailored to your needs, corporate discounts, options to work abroad, and 30 days of vacation along with time off extras. last updated 16 week of 2026