About Thomas
Versatile senior developer with around 20 years of experience — a deliberate generalist across web frontend, backend, and native mobile.
I build new platforms from the ground up and stabilize existing systems: from modular architecture and backend services to frontend, mobile, and test automation.
My recent focus has been FinTech — architecture, legacy modernization, and AI/RAG integration (Weaviate, OpenAI) — alongside projects in MedTech, eCommerce, public sector, and media.
The breadth is the point: I onboard quickly into new domains and stacks, think about products both technically and entrepreneurially, and turn business requirements into production-ready solutions. Often as the technical sparring partner for teams — architecture, code quality, best practices.
Stack incl.: TypeScript, Node.js, React/Next.js, Vue/Nuxt, NestJS, Python, Flutter/Dart, Docker, Kubernetes.
Not a specialist in one narrow thing — the developer you bring in when the problem doesn't fit a neat box.
German
Native or bilingual
English
Conversational
Portuguese
Basic
Spanish
Basic
Can work on-site
Köln (up to 50km), Berlin (up to 50km), Dresden (up to 50km), Hamburg (up to 50km)
Experience
- S-Communication Services GmbHSenior Full-Stack Software EngineerBANKING AND INSURANCEJanuary 2026 - June 2026 (5 months)Berlin, Germany
- System architecture & development: Design and implementation of new features for a legacy system. Active development of the backend systems and web components.
- Testing: Development of tests and test concepts for regression testing.
- Documentation: Maintenance of technical documentation following Arc42 for all involved systems.
- S-Communication GmbHSenior Full-Stack Developer / Software ArchitectBANKING AND INSURANCEJanuary 2025 - December 2025 (11 months)Berlin, Germany
- Systemarchitektur & Entwicklung: Entwurf und Implementierung einer modularen Systemarchitektur inkl. mehrere Backend- und Web-Frontend-Services. Aktive Entwicklung der Backend-Systeme.
- API- & Datenprozess-Koordination: Steuerung der technischen Kommunikation und Integration mit internen und externen Systemen für reibungslose Datenflüsse und API-Interoperabilität.
- Technische Roadmap & Best Practices: Erstellung einer strategischen Roadmap, Mentoring von Teammitgliedern und Optimierung von Entwicklungs- und Projektmanagement-Prozessen.
- Dokumentation: Aufbau und Pflege technischer Dokumentation nach Arc42 für alle beteiligten Systeme.
- Wissenstransfer: Unterstützung der PM- und PO-Ebenen bei der langfristigen Analyse und Design von Geschäftsprozessen
- S-Communication GmbHSenior Full-Stack EntwicklerBANKING AND INSURANCESeptember 2024 - December 2024 (3 months)Berlin, GermanyKernaufgaben
- Daten & KI: Integration und Betrieb einer Weaviate-Vektordatenbank inkl. Datenmodellierung und Vektorisierung
- Analyse & Architektur: Reverse Engineering bestehender Datenprozesse und Aufbau eines strukturierten Datenkatalogs
- Frontend & Backend: Refactoring der Web-UI und Anbindung an ein neues Backend
- Qualität & Dokumentation: Implementierung von Unit- und Integrationstests sowie technische Dokumentation nach arc42
TechnologienReact, Next.js, NestJS, TypeScript, Node.js, Weaviate, OpenAI API, Jest, REST, GraphQL, Docker, GitLabSoft SkillsAnalytisches Denken · Hohe Eigenverantwortung · Qualitätsbewusstsein · Strukturierte Arbeitsweise
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Education
- 100%Schule1999