HOW PINTEREST SCALED TO 11 MILLION USERS WITH ONLY 6 ENGINEERS

Summary from the TLDR Web Dev newsletter

Pinterest reached 11.7 million monthly active users (MAUs) in January 2012 with just six engineers. It was the fastest company at the time to surpass 10 million MAUs. Pinterest's growth journey involved several lessons, such as favoring database sharding over clustering and sharding incrementally over time. It faced numerous problems along the way, like data corruption due to some bugs in its clustering algorithm. This article dives into how Pinterest’s backend architecture evolved over time, such as the fact that it transitioned from Django to Flask as it grew.