Systems & full-stack engineer — C++ / Node-API · embedded · local AI.
I take engineering that used to need rare hardware and rare expertise and turn it into something anyone can clone and run.
node-onlykey-emulator — runs a hardware security key's real, unmodified firmware as a Node native addon. No device, no root, no USB. It boots, provisions a PIN, and types a password over USB HID — all as in-process events you can test. 183 tests passing; presents as a genuine OnlyKey to any OS via a Pi. Turned firmware development from "own the hardware, test by hand" into "clone it and go."
- Guncelium — anonymous P2P mesh (GUNdb) routed entirely over Tor.
- Real-time C++ memory engines bridged to JavaScript via Node-API.
- 15 years, board-level diagnostics and automotive ECM/TCM through to systems software and local LLM infrastructure.
Not a résumé — a page that proves instead of claims → bmatusiak.github.io/resume
bmatusiak@gmail.com