> Markdown version of [/jobs/ext/4686134-midtier-frontend-engineer](https://www.wearedevelopers.com/jobs/ext/4686134-midtier-frontend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Midtier Frontend Engineer - **Company:** NDI - Neue Deutsche Infrastruktur GmbH - **Location:** Berlin, Germany - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Application Programming Interfaces (APIs), Artificial Intelligence, Application Performance Management, Browser Compatibility, Code Review, Performance Tuning, Responsive Web Design, Software Engineering, Web Applications, Web Application Frameworks, Backend, Information Technology, Web Technologies, Front End Software Development, Software Version Control - **Published:** November 12, 2026 - **Apply:** https://www.adzuna.de/details/5956427520 ## About the Role * Degree in Computer Science, Software Engineering, or a related field * Experience in frontend development using modern JavaScript frameworks and web technologies * Strong understanding of responsive design, accessibility standards, and UI/UX principles * Familiarity with APIs, version control systems, and modern development workflows * Knowledge of frontend performance optimization and testing practices * Ability to work collaboratively in cross-functional product teams * Strong attention to detail and problem-solving skills * Motivation to build impactful digital products within a fast-paced startup environment * Excellent communication skills in English; German is a plus ## Description * Develop and maintain responsive, high-quality user interfaces for web applications * Collaborate closely with Product Designers, Backend Engineers, and AI teams to deliver user-friendly digital solutions * Build scalable frontend components and reusable UI libraries using modern frontend frameworks * Ensure performance, accessibility, responsiveness, and cross-browser compatibility of applications * Translate design concepts and user requirements into clean and maintainable code * Optimize frontend architecture and application performance * Participate in code reviews and contribute to frontend best practices and development standards * Support integration of frontend systems with APIs and backend services