This will make you a genius programmer ever wanted to know how big tech companies can handle billions of users daily.
The System Design Primer is a free, open source repository showing you how to design large-scale systems like netflix, google or amazon. Creating an infrastructure that can handle billions of requests daily without downtime is impressive and requires many different processes.
Like databases, web servers, caches, load, balancers and so much more.
This repository has all of that and amazing visual references, so you can see and implement all this for yourself. It includes a study guide and interview prep, for when you want to get a job in this industry.