Rive

A one-time file sharing service that generates short 6-digit codes for direct device-to-device transfers. Files are encrypted in the browser before leaving the sender's device, and each code can only be used once. The whole flow required no accounts, no apps, and no tracking.

The implementation was pure TypeScript with a privacy-first design philosophy. Peer-to-peer encryption happened entirely client-side, keeping the server out of the file transfer loop entirely.