Developed experimental features focused on group video chat within the Messenger Real-Time Communication team.

Team lead for Tinycards, Duolingo's first educational app outside of language learning and one of Apple's Top 10 Apps of 2016.

Tech lead for Duolingo's core learning products on iOS, Android, and web. Drove the development of new features, working with designers, engineers, and PMs to run experiments and improve key metrics.

Developed automated experiments to find optimal power settings.

Implemented interactive real-time networked physical simulations. A large-scale simulation, hosted on a server, was streamed to multiple low-end mobile devices, allowing users to interact with the same simulation in real time.