(S)Series

Learn itstep by step

Long-form series you read in order, like a short course. Each part builds on the one before it, with working code, so by the end you have built the whole thing, not just read about it.

Series 01 · 10 parts · 78 min

Real-Time Chat at Scale

Build a chat app with WebSockets step by step: from a raw socket to auth, storage, delivery guarantees, presence, multi-node scaling, load testing and production.

01WebSockets from First Principles
02Your First Chat Server with Socket.IO
03Authenticating WebSocket Connections
04Storing Messages: Schema, IDs and Pagination
··+ 6 more parts

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Series 02 · 10 parts · 34 min

Scaling to 1M Requests

Take a web backend from one server to a million requests: capacity maths, auto scaling, caching, databases, queues, rate limiting, serverless and observability.

01The Anatomy of a Million Requests
02Horizontal Scaling with EC2 Auto Scaling Groups
03Caching Layers: CDN, Redis, and Memory
04Database Scaling: Indexes, Replicas, and Pooling
··+ 6 more parts

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