Building XMTP - the decentralized, interoperable, end-to-end encrypted messaging protocol for the next generation of social apps.

Alongside smart coworkers:

• Designed and implemented decentralization protocol for message transport and storage

• Re-designed and implemented encryption protocol for Signal-level security and scalable group chats

• Re-designed identity system to support multiple identities and higher security

• Gave regular tech talks for the team

Part-time on session live streaming, link sharing, backend scalability.

Tech lead on end-to-end encryption and group video calling in Facebook Messenger.

• Tech lead on Vanish Mode (end-to-end encrypted ephemeral chats) in Messenger

• Tech lead on group video chat backend in Messenger

• IC on end-to-end encryption protocol in Messenger

• Mentored three interns who outperformed their peers and accepted full-time offers

Grew the CodePush developer service from founding to over 20k apps as of early 2017.

• Owned the storage layer, backend and REST API’s, contributed to the CLI and mobile SDK’s

• Also built JavaScript diagnostic tools in Visual Studio and browser developer tools in Internet Explorer