FastAPI WebSockets: Production-Ready Setup and Scaling
FastAPI websockets let you push data to a client the moment it changes, without the overhead of polling. In a few lines you can expose a bidirectional…
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WebSocket Real-Time Architecture: From Connection Pooling to Graceful Reconnection
Real-time systems are seductive. You build a basic WebSocket connection, messages flow instantly, and it feels like magic. Then your first user's netw…
Engineering Real-Time Telemetry and Secure Clinical Messaging with SignalR
I’ve spent plenty of time wrestling with WebSockets in my career, but things get a lot more intense when you're dealing with live cardiac vitals and p…
The Silent Crash: Handling Zombie WebSockets in Python IoT Applications
One harsh truth we discover while building backend systems for IoT devices like industrial sensors or electric vehicle (EV) chargers is this: Hardware…
Building Velodrome: A Real-Time Multiplayer Typing Race Game
Building Velodrome: A Real-Time Multiplayer Typing Race Game I built a full-stack typing game with live multiplayer, ghost racer replays, and per-key …
Real-time chat with Fitz: typed WebSockets and AsyncAPI auto-generated
Add a live click dashboard to the URL shortener from Part 2 using @ws("/path") , WsConn<T> , and the AsyncAPI 3.0 schema Fitz generates automati…
[System Design] Uber RAMEN: How Ride-Hailing Apps Push Real-Time Notifications to Millions of Devices
The Problem: Pushing Instant Notifications to Millions of Devices Answer-first: Uber's RAMEN system maintains persistent gRPC bidirectional streams to…
Real-Time Notification Systems Are Harder Than Most Teams Expect
If you’ve ever thought, “It’s just a WebSocket event,” this article is for you. Notification systems look simple on the surface, but in production the…
WebSocket Authentication Deep Dive — Tokens, Stateful Connections, and the CORS Bypass Nobody Warns You About
WebSocket Authentication Deep Dive — Tokens, Stateful Connections, and the CORS Bypass Nobody Warns You About WebSockets are powerful. They enable rea…