[franee]

Took me 1 month to be productive.

Went in to a large rails codebase as a backend developer in the middle of a v1 to v2 rewrite and it had custom folders with their own conventions on where to put stuff.

All that with no documentation except for the setup.

What I did was just ask how the app works + specific workflows in front-end side of things and just connect the dots on the backend part.

Most of my troubles where on where to put modules because of their existing conventions.

Tips: 1. Ask a lot 2. Read the code 3. A debugger helps 4. Make sure you add tests for areas you touch.