Felix Mennen

I build products. Then I build more products.

Founding engineer, side-project addict, writing code since 2014.

I helped build Echometer from day one. The CTO and I built the app, the infrastructure and everything in between, until the company was acquired.

On the side, I keep shipping products solo: an exam trainer for Germany’s dog owner’s license, an AI generator for animated brand mascots, a study app for the Heilpraktiker für Psychotherapie exam, and an analytics service that runs its queries in WebAssembly straight off S3. That last one is counting you right now, if you clicked “yes”. The full list is on the Work page.

I work mostly in TypeScript, care a lot about CI/CD and DevOps, and there’s always an agent working on something for me somewhere.