Recent Posts

An evening reproducing an open-source decision model's published numbers on a laptop - which claims held, which did not, how Metal compared to a T4, and the one measurement that turned into an upstream pull request.

Wealthsimple Predict routes to Kalshi's order books, and Kalshi has a public API. So I built a scanner to check all 8,047 eligible markets for risk-free arbitrage - sum-of-brackets, yes/no complements, and wide spreads. Here is the fee math, the market microstructure that kills the obvious plays, and the one edge that survived.

I built and deployed a full system design interview prep app - 25 topic deep dives, 28 worked case studies with runnable MVP code, a back-of-envelope calculator, and flashcards - in a single Saturday afternoon. Here is the architecture bet that made it basically free to run, and the agent fan-out that made it fast to build.