Description

I combine 10 years of Java/Spring Boot backend engineering with modern AI architectures.

With 10+ years of experience as Tech Lead & CTO, I design and build production-ready AI systems – from voice agents and document assistants to full backend architecture and integrations (CRMs, MLS, DocuSign, calendars, ticketing and property management systems).

Languages

English
Native or bilingual
German
Fluent
French
Fluent

Workplace preferences

Can work on-site

Mainz (up to 50km)

Compass AI — Compass Real Estate Voice Platform
AI Architect & Tech Lead
May 2025 - November 2025 (6 months)
Scottsdale, AZ, USA
Architected and delivered a voice-driven assistant that helps real estate agents create and update purchase contracts instead of manually editing PDFs.

Automated the flow from MLS data + spoken input → structured contract data → ready-to-sign documents via DocuSign, reducing time-to-contract and manual errors.

Designed modular LangChain pipelines with fallback logic, PIN-secured flows and robust logging so the system is safe to use in real negotiations.

Tech: Retell / Vapi, Node.js, NestJS, FastAPI, LangChain, PGVector, AWS, Docker
Retell LangChain FastAPI Amazon Web Services artificial intelligence
Axiombyte GmbH — Fractional CTO
Tech Lead & Architecture
December 2024 - May 2025 (5 months)
Hamburg, Germany
Took over the architecture and tech leadership of a new multi-tenant SaaS platform as Fractional CTO.

Introduced clear service boundaries, improved data model and CI/CD so releases became predictable and safer.

Set up automated testing, monitoring and error tracking, and supported planning/scope decisions with the founders.

Tech: Node.js, NestJS, PostgreSQL, Docker, GitHub Actions, AWS / DigitalOcean
Node.js Next.js Amazon Web Services IT Architecture Tech Lead
KipraxisHelfer GmbH
AI Engineer
January 2024 - November 2024 (10 months)
Berlin, Germany
Built a multilingual voice assistant that answers calls, pre-qualifies patients and books appointments instead of reception staff handling everything manually.

Integrated voice flows with existing calendars and clinic processes so no new tools were needed, only automation of the existing workflow.

Designed GDPR-compliant call flows in 10+ languages, with guardrails and fallback logic for real-world clinic usage.

Tech: Vapi, OpenAI, Node.js, FastAPI, n8n, JavaScript
vapi FastAPI Node.js artificial intelligence JavaScript