I take engineering that used to need rare hardware and rare expertise and turn it into something anyone can clone and run — then I point AI at it and ship. The work that used to cost a specialist and a lab, I make cost a git clone.
The decisionRun the real, unmodified OnlyKey firmware as a Node native addon — by mapping the microcontroller's memory at its true hardware addresses so the firmware's raw register and flash access just works, instead of rewriting the firmware to fake the chip.
The decisionBridge a multi-threaded C++ memory scanner to a JavaScript desktop runtime through Node-API — and keep V8's garbage collector out of the hot path by returning live, bound C++ objects through lazy getters instead of copying data across the boundary.
The decisionTake a standard P2P database and route every peer packet exclusively through Tor onion services, so the network syncs without ever exposing a node's identity.
My specialty isn't writing more code — it's removing the barrier that makes engineering expensive. Hardware-gated firmware became a clone. A Linux-only tool became every-OS. That's leverage, and it compounds for everyone who builds after me.
The emulator didn't add a feature — it became the thing an entire ecosystem (and its AI contributors) now develops on top of. I build the floor other people's work stands on.
The scarce skill now isn't keystrokes — it's judgment: knowing what to build, telling correct from plausible in domains where that's hard, and steering AI to ship it fast. I've done exactly that to produce systems that run and are tested.
Every claim on this page links to something that runs. I'm strongest evaluated by what I've built, not by how I perform in a room — so I hand you the running proof and let it speak.
Built the OnlyKey firmware emulator above, plus private R&D into on-device / local AI. Turning hardware-security tooling into software anyone can run — the most current, most demonstrable work here.
Bare-metal server configs, secure network architecture, custom client builds; designed and debugged hardware/software rigs for ECM/TCM engine-control tuning.
High-volume diagnostic triage and component-level repair on commercial/enterprise hardware, mobile systems, and network servers.
Advanced diagnostics, board validation, and high-volume repair across mobile and consumer architectures.
Early Node.js adopter (2012, Cloud9 IDE): custom full-stack backends and automated diagnostic tools; board-level troubleshooting and system builds.
Established deep diagnostic workflows for physical device failure, component mapping, and dedicated troubleshooting suites.
Coordinated with GUNdb core maintainers on modern-environment builds; developed experimental USB HID firmware emulation on microcontrollers.
I don't interview well, and I'd rather tell you that than perform around it. What I do is build things that work — so evaluate me the way my work is meant to be judged: run it.
git clone github.com/bmatusiak/node-onlykey-emulator — build it, and watch a security key's real firmware boot, provision, and type a password, with no hardware in the room. That's the interview. I'll walk you through any decision in it.
If your bar is "can this person take an expensive, hardware-bound, expert-only problem and make it cheap and repeatable" — that's the whole page.
Same file. This is the clean, structured résumé an ATS or LLM extracts — while the human above reads the real case. One document, two audiences.
NAME Bradley Matusiak TITLE Systems & Full-Stack Engineer — C++ / Node-API / Embedded / Local AI EMAIL bmatusiak@gmail.com PHONE 904-547-0439 GITHUB github.com/bmatusiak LOCATION St. Augustine, FL EXPERIENCE 15 years SUMMARY Self-taught systems engineer. Specialty: removing the barrier that makes hard engineering expensive — turning hardware-gated, specialist-only work into software anyone can clone and run, and directing AI to build it fast. SKILLS Systems/native ...... C++, Node-API (napi), memory mapping, process hooking, pointer chains, bitwise, multi-threading Full-stack/desktop .. JavaScript, TypeScript, Node.js, NW.js, Electron, HTML5 Canvas Local AI ............ node-llama-cpp, CUDA, model eval/soak, MCP, OpenAI/Anthropic-compatible serving Security/networks ... zero-trust crypto, OnlyKey/hardware auth, Tor onion services, GUNdb P2P mesh Embedded/firmware ... Marlin/RepRap, ESP32, ATmega32U4, USB HID, G-code Automotive/hardware . ECM/TCM bench-flash, CAN bus/OBD-II, board-level diagnostics, micro-soldering, data recovery EXPERIENCE 2023-Present Independent Systems R&D / Open Source OnlyKey firmware emulator; hardware-security tooling; private on-device AI R&D. 2020-2023 Independent Contractor — Systems & Automotive Embedded, FL 2016-2020 Lead Diagnostics & Hardware Specialist, Computer Doctors 2014-2016 Lead Diagnostics Specialist, iRepairFast 2012-2014 Lead Service Technician & Developer, P2P Computers (early Node.js, 2012) 2008-2012 Lead Diagnostics Specialist, iRepairFast PROJECTS OnlyKey Emulator .... runs real security-key firmware as a Node addon; 183 tests passing; cross-OS via USB gadget. Memory/Pathfinding .. multi-threaded C++ scanner bridged to JS via Node-API. Guncelium ........... anonymous P2P mesh routed over Tor. EDUCATION Expert self-directed specialization — systems architecture, cross-language runtimes, graph theory, applied cryptography.