Twenty years between product and engineering. Right now at Ascléa, a medical AI company from the Charité, working on language models for hospitals.
Ascléa is a Charité spin-off (formerly x-cardiac). We build AI for hospitals. I lead product for Clé: open language models inside the clinical network, on-premise or in a EU cloud the hospital runs.
Interim CTO at a startup building connected hardware and software. Led 23 engineers across firmware, mobile and cloud. Defined IoT architecture and device-to-cloud communication; scaled the platform through to acquisition by a US company.
Part of the leadership team at a management consultancy. Led a client project on AI-based used car pricing, from visual prototypes and click dummies through to a single-page app with real-time pricing models. Product ownership across discovery, epics, backlog, stakeholders and delivery with frontend, UX and QA in rapid prototyping cycles.
Built, trained and led a team of developers and technical project managers at one of Germany's leading creative agencies. Product strategy for major brands including BMW, Daimler and Lufthansa; co-led technical conception and delivery of global web presences. Drove PWA, headless CMS and VR/AR in a fast-moving creative environment.
Helped establish IBM iX Studio Hamburg and build its digital capabilities: design, engineering and early AI research under one roof. Watson prototypes from 2015, including a BMW i8 configurator. Design Thinking workshops and client consulting; translated complex business needs into scalable architecture.
Grew from developer to team lead and subject matter expert. Built digital products for major brands, mentored junior developers, and learned that the best code is the one that ships and works.
First job. Front-end for enterprise clients. A proper intro to web development.
More than 600 buying guides backed by over 4,000 sources. The recommendation comes first, with clear reasons and the alternatives right below. AI analyses products to fixed quality rules, an editor checks the result.
Next.js · Vercel AI Gateway · Neon · SEO
Name a book you liked or set your taste, and get exactly one winner with its reasoning in the open. Every book carries a sourced taste fingerprint. Code ranks the books; the language model only writes the verdict. German-language editions.
Next.js · Vercel AI Gateway · Neon · Deterministic ranking
Gift ideas sorted by person, not product. One sentence is enough: the app parses person, occasion and price on the device. A timeline shows who still has nothing before each occasion, and a shared link coordinates Christmas with the family. No account, and everything stays on the device. Version 2.0, free for iPhone and iPad.
React Native · Expo · Next.js · Local-first
Photograph a bag of coffee and get grind, dose, yield and time in your grinder's own units. Two taps after the shot return exactly one change. New in 2.0: find 800+ roasteries to buy the coffee again, and separate numbers for everyone at the machine. On the App Store for iPhone.
React Native · Expo · AI vision · Next.js
What the town hall decides, where you can have a say and what applies on your routes, in one place and with a source for every claim. Independent of the city, in German. Not public yet: the preview is password-protected.
Next.js · Neon · Python · Open data
An invented club, dry one-liners, a turn in a few minutes. Up to four managers on one device and friend challenges by code. No ads, no account, no network needed, and the first season is free. In German, on the App Store now.
React Native · Expo · Offline-first · Game engine
Turns a family's actual travel route into personalised chapters, vocabulary and real-world missions for kids aged 5 to 9. Expo/React Native app with a Next.js marketing site.
React Native · Expo · Personalization · Next.js
Playing the video sends data to YouTube.
TokenMade · Episode 16 · August 2026 · 30 min · in German
On the TokenMade podcast I show how Anthropic's Fable model turned collected specs into a complete product comparison site on the first attempt. I also explain why groundwork like specs and ADRs matters more than ever, while UX, UI and content still need human intuition.
Figure out the product first, then how to build it
Say what you mean. Honest disagreement beats polite confusion
Leadership is removing blockers, not adding meetings
Humour, empathy and transparency are the hard part
Stay slightly unsatisfied. Keep asking why
