• Hello

Built CanvasFlow, a real-time collaborative whiteboard: a React canvas editor on a custom canvas engine, a NestJS API gateway and a WebSocket sync server, deployed on Vercel and Fly.io.

Cut board load time from 7.6 s (peaking at 44 s) to 148 ms by compacting the Yjs update log into a bounded snapshot window, shrinking a board's stored history from 86 rows / 3.85 MB to 3 rows / 27.8 KB.

Reduced production database latency by moving serverless functions next to the database region (saving ~220 ms per round trip) and sharing one connection pool per process (removing a ~500 ms handshake on each route's first request).

Load-tested the API gateway with k6 at a p95 latency of 23 ms, serving 2,696 requests/s across 50 concurrent users with 0% failed requests, and built a WebSocket load-test harness with real sync clients that tracks cursor and edit p95 against 80 ms / 100 ms targets.

Built real-time collaboration over WebSockets (live cursors, presence and edits) with automatic reconnect and exponential backoff, and scaled it across multiple instances with Redis pub/sub so rolling deploys no longer split a live board between users.

Shipped AI diagram generation with Claude that streams the diagram as it is written, with monthly per-plan quotas enforced in a single atomic statement.