I mostly write C and C++ on Windows: drivers, process internals, and tools that talk to the OS directly. Before that it was embedded C on STM32 and circuit boards I assembled myself. Heading toward red teaming and malware analysis.
Hadal: a Tailscale-only remote for Windows. Screen streaming, touchpad, files and power control from an Android phone. C++ service and tray app, Kotlin app, fuzzed with libFuzzer and ASan.