Things I build myself.
Products and open source I develop alongside client work, from coding-agent workflows to rail travel and thermal imaging.
QualityLayer
The software factory for your coding agents
- Plan before code
- macOS / Windows / Linux
- Claude Code & Codex
QualityLayer turns a request into a reviewed code change with the coding agents you already use. You approve a plan before code is written, then your agent builds it test first. An AI that did not write the code checks the result against your request, with evidence you can open in the App.
Originally released as Pilot Shell.
Bahnsparer
Fares, reliability and live journeys for German rail
- iOS, Android & desktop
- Free, no account
- Data stays on device
Bahnsparer compares fares, travel time and historical reliability across operators, then watches a fixed day or a range of up to 14 days for a better price. After booking, it follows the trip live, records the arrival and prepares the facts for a possible passenger-rights claim. Every request runs on your device, and there is no account.
DIY-Thermocam
Open-source thermal imaging for everyone
- 1.2k+ GitHub stars
- 181 forks
- C/C++ · FLIR Lepton
A do-it-yourself thermal imager around the FLIR Lepton sensor: firmware, PCB, enclosure and desktop suite, all public and buildable at home with standard tools. It began as my bachelor thesis and is now used by makers, schools and companies.