Real-Time Backend

WebSocket, LiveKit SFU, multiplayer game infrastructure, and scaling real-time systems.

Real-Time Backend 11 min

Your WebSocket Server Leaks Memory at 500 Connections — Here's Why

The memory graph climbed all night while the connection count sat flat at 500. The culprit was not a code leak — it was zombie sockets the garbage collector could never reach. A war story, a reproduction, and the five-line fix.

Jun 5, 2026

Read →

Real-Time Backend 15 min

Building a Production WebSocket Backend That Survives Real Traffic

Connection lifecycle, authentication, room design, backpressure, and Redis pub/sub — everything it actually takes to run a WebSocket backend under real user load. Drawn from Matrix Bingo, a live multiplayer game at scale.

Jun 4, 2026

Read →