Personal details
Sebastian F.
Technical skills
About
Available from November 1, 2026 for full-time, multi-month contracts. Remote-first, with occasional on-site work in DACH and Benelux; further travel by arrangement. Contracts through Sebastian Software GmbH.
I build and modernize web applications as a senior React/TypeScript developer and frontend architect, from product interfaces and backend integration to testing, CI/CD, and cloud infrastructure. My work includes international investment platforms for DWS/MorgenFund, the foundation for 17 Witt Group shops, and AI-assisted internationalization at Regrello. I built Terminaro and Palamedes with React Router, TypeScript, and Convex.
Most recently, I helped make Vidal MMI’s Gelbe Liste Online React frontend ready for launch and supported WaPo Compliance as a technical partner for architecture, product modules, tests, deployments, and recovery. I work in German and English.
Work Experience
Technical partner for a compliance SaaS platform for mid-sized businesses. Advised two founders on architecture and product modules and contributed hands-on implementation. Separated consulting and white-label clients; established shared staging and production deployments, scripted environment setup, sharded tests with shared caches, and database restore checks. Removed passwords from server logs and sanitized PDFs; contributed to the whistleblowing database and React frontend. React, Next.js, NestJS, TypeScript, PostgreSQL, Docker, GitHub Actions, Keycloak. Direct client contract through Sebastian Software GmbH.
Helped make the Gelbe Liste Online pharmaceutical reference portal ready for launch. Implemented access rules by healthcare profession and prescription status, search and IDENT A drug identification, and product pages. Added structured data and analytics for SEO and advertising, targeted regression tests, and a shared TypeScript/lint quality gate. Stack: React, TypeScript, TanStack Router/Query, Schema.org, Piano Analytics. Direct client contract through Sebastian Software GmbH.