> blog --category
System Design Case Studies
3 posts2026
System Design Case Studies
- How AWS Lambda Runs 15 Trillion Invocations a Month: Firecracker, Snapshots, and Tiered Caches (opens on Medium)
Inside the microVM stack, snapshot restores, and three-tier caches that let one platform run trillions of tenant invocations.
- How WhatsApp Moved 50 Billion Messages a Day With Just 32 Engineers (opens on Medium)
How 32 engineers ran a global messaging service on Erlang, Mnesia, and FreeBSD, and the ruthless simplicity that made it possible.
- How YouTube Scaled MySQL to 2.49 Billion Users: The Vitess Story (opens on Medium)
A tour of Vitess, the layer that lets YouTube run 2.49 billion users on plain MySQL, plus the 9 patterns any team can steal from it.