Starting a new company with old friends.

Built ML and LLM-enabled features for a personal finance startup.

I led the Payment Intelligence group responsible for fraud prediction and prevention (Stripe Radar), optimizing authorization rates and minimizing transaction costs, and using ML to help merchants understand their customers and optimize payments.

I led eight engineering teams responsible for the end-to-end homes search and booking experience at Airbnb: guest landing page, sign-in, search results and refinements, home detail, and booking experience; as well as machine learning and relevance for search ranking, customizing the guest experience, and push/email notifications.

I led the teams which owned Twitter's home timeline, using machine learning to show the best tweets; also A/B experiment infrastructure used across the company. Previously led ads ranking, prediction, and targeting.