CodeCrafters

At CodeCrafters, developers learn by building real-world software from scratch—Git, Redis, SQLite, and more. We believe the best way to master complex systems is to get your hands dirty and write the code yourself. Our audience is made up of experienced developers who value clarity, precision, and depth. We're backed by YC and the founders of Instagram, Dropbox, Supabase, etc. We're also the maintainers of Build your own X (GitHub's 2nd most popular repository with ~400k stars).