One builder. The whole product.

I came to Kiel to study business informatics — and somewhere between the economics lectures and my first real lines of code, I found what I actually wanted to do. Programming wasn’t on the syllabus as a passion, but it became one. Today I build under the name Frenkel Systems: complete products, shipped solo.

I don’t split my work into ‘frontend,’ ‘backend’ and ‘AI’ — I build the whole thing, because that’s how software actually ships. What pulls me in is the moment a product stops being a demo and starts doing real work: a tradesperson’s day that reorganizes itself around traffic, a stranger who turns into a tour guide in your ear, a promoter who levels up with every ticket sold.

I build mostly for real businesses in the north, not slideware, and I work solo on purpose — one person who holds the entire system in their head moves faster and cuts deeper than a room full of handoffs. FieldPilot and jawnt are where most of that energy goes right now, with more cities and more products already in build.

If you’re making something that has to work in the real world, tell me about it.