HOW PINTEREST SCALED TO 11 MILLION USERS WITH ONLY 6 ENGINEERS

Summary from the TLDR Web Dev newsletter

Pinterest scaled rapidly from a small startup with just 1 engineer to handling 11 million monthly active users with only 6 engineers. The key takeaways from its scaling journey include the importance of using known, proven technologies, keeping the architecture simple, avoiding overcomplication, favoring sharding databases over clustering, and embracing limited, proven choices. Pinterest went through various phases of growth, optimizing its tech stack along the way, and learned valuable lessons about database structuring and management, such as how to pick proper database primary keys when sharding.