18 tasks
Build Your Own HTTP Server
Build an HTTP server from raw TCP sockets. No frameworks, no libraries - just you and the protocol specification. Understand exactly what happens when browsers talk to servers.
Build Your Own
Practical learning through real-world projects from scratch. Understand how things work under the hood.
8 tasks
1 Billion Row Challenge
Process 1 billion temperature measurements as fast as possible. Start with a working solution, then systematically optimize - I/O, parallelism, parsing, data structures - until you're competing with the best.
19 tasks
Build Your Own DNS Resolver
Understand DNS from the ground up by building a recursive resolver. Parse binary protocols, query root servers, follow delegation chains, and implement caching.
8 tasks
Build Your Own Docker
Build a container runtime from scratch. You, go and and the Linux kernel. Understand exactly how containers achieve isolation.