Top Front End Developer Jobs in Berlin

Rebuild a central Flex/Flash frontend into a complex, highly interactive HTML5/JS SPA. Implement rich UI using modern JavaScript frameworks, ensure high UX and CSS quality, apply testing practices (TDD/BDD), collaborate in a cross-functional agile team, and adopt DevOps/fullstack responsibilities. Cross-platform mobile experience is a plus.

Join a cross-functional team to design, build, and maintain frontend features and UI components for large, long-lived products. Contribute to frontend practices, accessibility, progressive enhancement, code reviews, and collaborate with product, UX, and other engineers to improve user journeys and frontend architecture.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Design and implement complex customer-facing frontend features using TypeScript and React. Provide technical leadership, mentor junior engineers, drive frontend architecture and best practices, improve performance and accessibility, partner with product/design, integrate with backend APIs, and manage technical debt and scalability.

As a Digital Architect, you will design web and mobile solutions, collaborate with teams, mentor developers, and support technology migration projects while communicating in German and English.

Lead product design for frontend/domain-level systems to raise UI quality and delivery efficiency across Vinted. Build and scale design infrastructure and design systems, ensure accessibility compliance, drive AI-enabled frontend productivity, and manage multiple teams while partnering with engineering and data counterparts to balance developer velocity with exceptional user experiences.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

Design, build and maintain performant, scalable frontend features for desktop, mobile and tablet using React and TypeScript. Collaborate with product, UX and QA, own large projects end-to-end, improve frontend architecture and Core Web Vitals, ensure accessibility, write and review tests, optimize development workflows and CI/CD.

Design and build responsive, accessible frontend interfaces using modern frameworks. Lead frontend development from concept through deployment, collaborate with backend engineers, designers, and product managers, and ensure application performance and quality across devices and browsers.

Build and architect high-performance, data-rich interfaces using React and TypeScript for observability products. Own frontend architecture, state management, component patterns, visualization, testing, and performance across massive datasets. Collaborate with product, design, and backend teams to deliver user-facing features, leverage AI coding tools, advocate for user experience, and mentor engineers. Experience with observability, OpenTelemetry, cloud-native technologies, and startup environments is advantageous.

The role involves building scalable web applications using modern JavaScript frameworks, ensuring accessibility, and collaborating with teams while utilizing AI tools responsibly. Excellent communication skills in English and German are required.

Design, develop, and test user interfaces for mobile and web applications. Build reusable frontend code and libraries, translate user and business needs into functional solutions, debug and optimize applications, and collaborate with product management and user interaction designers. The role emphasizes end-to-end ownership, teamwork, adaptability, and converting ideas into implemented products.

Lead frontend architecture and implementation using React, Next.js, Tailwind CSS and TypeScript. Use AI tooling daily to navigate codebases, collaborate with designers, optimize performance and integrate with backend APIs. Drive technical direction, conduct substantive code reviews, mentor engineers, and ensure production-grade rendering, testing, and accessibility.

Own and deliver end-to-end full-stack features with a frontend focus: improve UX and visual quality, build complex accounting platform functionality, extend Python/FastAPI and Django backend, use AI-assisted coding tools, and contribute to architecture and code quality in a small senior team.

Design, build, and maintain responsive, accessible frontend applications and reusable UI components. Collaborate with product designers, backend and AI teams to integrate APIs, optimize performance, ensure cross-browser compatibility, and uphold frontend best practices through code reviews and testing.

As a Senior Frontend Engineer, lead the development of responsive UIs for an AI platform, ensuring code quality and collaborating with teams to enhance features and tools.

As a Senior Frontend Engineer, you'll deliver web-based AI modeling tools, optimize frontend architecture, and collaborate on complex UI components.

As a Senior Frontend Engineer, you'll design and deliver React/TypeScript components, optimize performance, and lead frontend architecture for complex web apps.

As a Senior Frontend Engineer, you'll create production-ready web components using React and TypeScript, optimize performance, and collaborate with teams to deliver complex UIs for AI applications.

As a Senior Frontend Engineer, you'll lead the development of web apps using React and TypeScript, creating intuitive, data-driven UIs, while implementing best practices and performance optimization.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Lead frontend engineering for AMBOSS's B2B Educator Tool: design and deliver features, set frontend best practices (testing, accessibility, performance), integrate AI coding agents into the workflow, collaborate with product and design, handle support requests, and mentor engineers to improve code health and delivery.

Own and design the frontend architecture using React and TypeScript, deliver high-quality testable code, integrate A/B testing and feature-flag systems, collaborate with backend and product teams, mentor engineers, and drive product-quality and performance improvements.

Lead frontend architecture and delivery for complex Web3/DeFi applications. Build UIs for lending, trading, staking, bridging, and stablecoins; mentor engineers; collaborate with founders, smart contract and backend teams; align with customers on scope and timelines; ensure performance, quality, and secure production-grade products.

Lead modernization of frontend architecture for React Native mobile apps and supporting React web surfaces. Improve performance, reliability, accessibility, developer experience, testing and CI/CD. Drive large-scale refactors, establish best practices, mentor senior engineers, and collaborate across backend, product, and design to deliver scalable, high-quality user experiences.