28.09.2026 aktualisiert
verifiziert
Premiumkunde
100 % verfügbarSenior Frontend Engineer / Architect | React, TypeScript, Next.js | Tesla, Zalando
Krakow, Polen
Deutschland +3
Master of Science (MSc), Geographical Information Systems, Jagiellonian Universityinfo: Deutschland, Österreich, Schweiz, Polen
Über mich
15+ years building and shipping web applications - from seed-funded startups to Tesla, Zalando, MetLife, and Delivery Hero. I’ve opened offices, built teams, led hiring, and delivered products from zero to one. ENTJ personality type. I work best with smart, driven people. I love what I do.
Skills
AI AgentsVitestViteJavaScriptAgile MethodologieGitHubJavascript LibrariesPythonPostgreSQLMongoDBMySQLSoftware ArchitectureAngular 2+Next.jsTypeScript
I’m a Senior Frontend Engineer and hands-on Architect specialising in React, TypeScript and Next.js, with full-stack TypeScript capabilities and experience building AI-powered products.
With 15+ years of experience, including projects for Tesla, Zalando, Delivery Hero and Axel Springer, I help teams launch products, modernise complex frontends and take features from concept to production.
Frontend engineering is my core specialisation: application architecture, user interfaces, state management, API integration and automated testing. I also deliver across the full TypeScript stack using Node.js, NestJS, Express and PostgreSQL, taking ownership of backend services and infrastructure when the project requires it.
AI is central to my development workflow.
At Growney and HintCraft, I established AI-assisted software development workflows, combining coding agents and development automation with engineering judgment, code review and testing. I also build user-facing AI features through LLM integration.
Selected experience:
• Tesla: built real-time factory monitoring interfaces used across gigafactories in the US, Europe and China.
• Growney: led frontend development for two production applications built from scratch, owning frontend architecture and introducing AI-assisted development workflows.
• mobile.de: resolved 3,000+ TypeScript issues in one month, reducing errors by approximately 80%.
• HintCraft: built and launched an AI-powered career platform with Next.js, React, TypeScript and PostgreSQL, owning UX, frontend, backend and infrastructure.
• Axel Springer: contributed to rebuilding the bild.de homepage using Vue.js and GraphQL.
• Delivery Hero: developed customer-facing features and product experiments for mjam.net and pizza.de.
My industry experience spans banking and fintech, e-commerce, online marketplaces, digital media and manufacturing.
Bring me in when you need:
• Senior frontend expertise and hands-on architecture.
• Full-stack TypeScript development from interface to backend.
• React application modernisation and codebase improvement.
• AI-powered product features and practical AI-assisted engineering workflows.
• Technical leadership, mentoring and clear ownership of delivery.
Based in Berlin & Krakow, with extensive experience working with German clients in hybrid arrangements, combining remote delivery with on-site collaboration.
Send me your project brief, current stack and target start date to discuss how I can help.
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit2013
Sprachen
GermanGrundkenntnisseEnglishverhandlungssicherPolishMuttersprache
Projekthistorie
Building HintCraft, an AI-powered job landing platform for experienced professionals. Owns the product end to end: positioning, UX, frontend, backend, infrastructure, content and marketing. Built and launched the platform with Next.js 16, React 19, TypeScript, Mistral AI and PostgreSQL. Developed AI/LLM-powered features: interview preparation, self-assessment and job search strategy.
Led frontend development for two production applications built from scratch. Owned the frontend architecture working closely with product, backend and business team. Built a React-based application on AWS Amplify and took full technical ownership of the frontend. Created a Hugo + CloudCannon website for non-technical users. Tech Stack: TypeScript, React, GraphQL, Amplify UI, AWS, Vitest, Playwright, Chromatic.
Built frontend for Tesla's factory monitoring system used across gigafactories in the US, EU and China. Developed real-time dashboards for factory operations teams. Built tooling to detect issues faster. Set frontend standards adopted by the engineering team. Tech Stack: TypeScript, JavaScript, React, NestJS, Jotai, TanStack, Tailwind, nextJS, Postgres, TypeORM, Github, Jest, Playwright.