Six years in backend, most of it at DraftKings, where I owned 24+ microservices on the daily fantasy side. Later I deployed LiteLLM as the company's internal LLM gateway and ran it for 3,000+ users at 400 billion tokens a week. I also contributed five fixes upstream. All five merged. Now I mostly build small local-first tools, like Scrawl, a Mac dictation app on whisper.cpp.