This worked for me when I was working with startup sized codebases doing mostly CRUD app stuff. Once you know how it's generally laid out you can start being pr

This worked for me when I was working with startup sized codebases doing mostly CRUD app stuff. Once you know how it's generally laid out you can start being productive. But now I'm working on nuts and bolts cybersecurity stuff for a tech giant. Stuff like public key infrastructure. Even if I know why things are done, stepping through someone else's code with expected behaviors, pathological cases, and error cases has been extremely helpful because there are so many more subtleties to worry about.