Freelance Full-Stack Developer in Berlin
Senior React, Next.js & Node.js engineer for teams that need someone who can own a feature from frontend to backend and ship it to production. 8+ years building greenfield architectures, design systems, and AI-powered features for enterprise and scale-up teams.
Auch auf Deutsch verfügbar.
✓ Available for Freelance · Berlin & Remote
What I Can Own
Figma → architecture → frontend → API → database → integrations → testing → deployment. A full-stack engagement here means covering the whole path, not handing off at the API boundary — React/Next.js/TypeScript on the frontend, Node.js/NestJS or PHP/Laravel and PostgreSQL on the backend.
Services
Full-Stack Feature Development
React/Next.js frontends backed by Node.js/NestJS APIs — designed, built, and shipped end-to-end.
Frontend Architecture & Design Systems
Greenfield platform architecture, component libraries, Figma API automation, and multi-brand design systems.
AI Integrations
Azure OpenAI, Vercel AI SDK, RAG architecture, MCP, and AI agents wired into production frontend systems.
Search, Performance & Legacy Modernization
Algolia-certified search implementation, Core Web Vitals optimization, and zero-downtime migrations off legacy stacks.
Technology
Frontend
Next.js (SSG, SSR, ISR), React, TypeScript, Design Systems
Backend & API
Node.js, NestJS, PHP, Laravel, PostgreSQL, GraphQL, REST
AI & Agents
Azure OpenAI, Vercel AI SDK, RAG Architecture, MCP
DevOps & Tooling
Docker, AWS, CI/CD, Figma API, Playwright, Cypress
Proof
One Codebase, Twenty Brands
Architected a greenfield platform for 20 brands within the Oetker Group on a single shared codebase — a 40% reduction in infrastructure costs and one pipeline serving every brand.
Figma-to-Code Automation
Automated a Figma API pipeline that turns design tokens directly into production code, cutting the DesignOps cycle from days to hours.
Zero-Downtime Migration Across 20 Brands
Led a zero-downtime migration across all 20 brands, paired with an Algolia-certified search implementation.
Relevant Case Studies
Engagement Models
Architecture & Technical Audit
A focused review of your current frontend/full-stack architecture, with concrete recommendations.
Short-Term Project
A defined scope — a feature, migration, or integration — taken from design to production.
Feature Sprint
Embedded with your team for a sprint or two to ship a specific, scoped feature end-to-end.
Ongoing Freelance Engagement / Embedded Senior Engineer
Longer-term freelance capacity, embedded in your engineering team as a senior full-stack contributor.
Frequently Asked Questions
What does a freelance full-stack developer in Berlin typically handle on your engagements?
Everything from architecture through delivery: frontend (React, Next.js, TypeScript), backend and APIs (Node.js, NestJS, GraphQL, REST), and the integrations, testing, and deployment work needed to ship it to production — not just a slice of the stack.
Can you work inside an existing Next.js codebase, or only greenfield builds?
Both. Experience ranges from architecting greenfield multi-brand platforms from scratch to embedding in existing teams and codebases to ship features, fix architecture debt, or lead a migration.
Do you handle both frontend and backend, or just frontend?
Both. Frontend architecture (React, Next.js, TypeScript, design systems) is the core specialty, backed by real backend and API experience (Node.js, NestJS, PHP/Laravel, PostgreSQL, GraphQL, REST) — enough to own a feature end-to-end.
Do you work with Berlin startups as well as established enterprises?
Yes. Notable clients include Oetker Group, Porsche, Julius Baer, Volkswagen, and IKK Classic Bank — engagements range from enterprise-scale multi-brand platforms to smaller, faster-moving product teams.
Can you work fully remote, or only on-site in Berlin?
Both — based in Berlin, available for freelance work on-site, hybrid, or fully remote worldwide, comfortable with async teams and time zone flexibility.
What's your core technology stack?
Frontend: Next.js (SSG, SSR, ISR), React, TypeScript, design systems. Backend: Node.js, NestJS, PHP/Laravel, PostgreSQL, GraphQL, REST. Plus Docker, AWS, Playwright/Cypress, Figma API automation, and AI integration (Azure OpenAI, Vercel AI SDK, RAG, MCP).
Can you join an existing engineering team, or only work solo?
Both — has led a team of developers as well as worked solo on greenfield architecture. Comfortable embedding into an existing team's workflow or owning a project independently.
Need a Full-Stack Engineer in Berlin Who Can Own the Whole Stack?
Let's talk about your project — architecture, a feature you need shipped, or ongoing freelance capacity.
Or see the full profile & FAQ.