Algorithm patterns & code templates
End-to-end architecture problems
Design patterns & practical code
Deep dives into core tech
Production systems & operations
Consensus, replication & more
Kernel, networking & system calls
Quick reference cards for interviews
“AI coding tools cut completion time by 25-55% for well-defined tasks like boilerplate, tests, and documentation, but they barely help with novel architectural design work”
“This is the shift from 'everyone knows everything' to 'we need some structure.' It's the first real organizational growing pain”
Fast, simple distributed storage that just works for small files
Copies data across multiple nodes for fault tolerance and read scalability
Every durable database writes intentions to a sequential log before touching actual data files. If the process crashes mid-write, the log contains everything needed to either finish the operation or roll it back cleanly