I'll post this here for fellow nerds as all the non-nerds will complain if I put it in the general Bluesky thread.
newsletter.pragmaticengineer.com

Building Bluesky: a Distributed Social Network (Real-World Engineering Challenges)
Bluesky is built by around 10 engineers, and has amassed 5 million users since publicly launching in February this year. A deep dive into novel design decisions, moving off AWS, and more.
