Ultrack
Solo-built fitness-tracking app (iOS/Android), in production. Offline-first React Native + Expo with an on-device SQLite sync engine against a Postgres backend, plus full CI/CD and production operations.
Stefan Andonov
Embedded & systems engineer · C/C++, close to the hardware
Based in the Netherlands
I build software that runs on real hardware - device drivers, low-level protocol work, and cross-domain debugging on embedded platforms. I like working close to the metal and I am moving toward operating-system and kernel-level engineering. (Placeholder - rewrite in your own words.)
Projects
Vibecodium
Self-hosted cross-device control plane for persistent terminal coding-agent sessions, managed from laptop and phone over a Tailscale mesh (systemd-scoped sessions, memory-pressure-aware idle reaper, replayable soak harness).