This looks awesome. Does anyone know of something similar for backend / program design (not UI, but actual code architecture)? I.e. step by step building of som

This looks awesome. Does anyone know of something similar for backend / program design (not UI, but actual code architecture)? I.e. step by step building of some application/program and watching how design decisions and refactoring decisions are made? Rails tutorial is the closest I've seen and that doesn't get very complex.