A product manager's workbench. Everything here went the whole way — the question, the prototype, the release, and reading what happened afterwards. Some of it is live. Some is still finding its shape.

Built tofind out.

Projects

Featured · Full-Stack Productlive2025

Handwrite

Type a message. A pen plotter writes it in real ink on a real postcard, and the post carries it the rest of the way. Stripe at the front, hardware at the back, nobody in between.

iOS Appshipping soon2026

Wirkraum

The first step of a Natura 2000 screening, on a phone. Drop a point, pick a radius up to 5 km, and read the protected sites around it — 1,601 of them embedded, every query offline, every row traceable to its source.

iOS Applive2025

VibeEcho

Point it at any public Instagram profile and it reads the room: engagement, what the comments actually say, and the hours that work. Reels get watched frame by frame.

Open Source / Design Systemlive2026

LubaUI

A SwiftUI design system you compose rather than configure. 37 components, behaviour you can attach to any view, and themes that repaint every screen at once — one package, five Apple platforms.

Research / Open Sourcelive2025

AnimalTaskSim

How mouse-like is your agent? A benchmark that scores reinforcement-learning agents against real rodent and primate behaviour, one metric at a time.

Now

— September 2026

Shipping
Wirkraum
Shipping
LubaUI 0.2.0
Building
Handwrite
Building
Recruiting with Agents
Tinkering
AnimalTaskSim
Based in
Düsseldorf
  1. Published the Wirkraum page — the Natura 2000 screening app that started as the LubaUI field test, now with real coverage figures, its own palette, and the scope boundary stated up front.
  2. Rewrote the LubaUI page around the 0.2.0 release, and refreshed the agent reference it serves at /lubaui/llms.txt.
  3. Shipped LubaUI 0.2.0 — themes that repaint their components, Reduce Motion honored system-wide, a type scale that grows with Dynamic Type, and built-in strings in English and German.
  4. Started building a real iOS app on top of LubaUI — the first proper test of the system outside its own showcase.
All projects7 entries · 5 active · 2 archived