I just came across a wonderful book that can probably help us all in here: The Software Engineering at Google book.

"The Software Engineering at Google book (“SWE Book”) is not about programming, per se, but about the engineering practices utilized at Google to make their codebase sustainable and healthy."

It was published on March 2020, and they just made it available for free at https://abseil.io/resources/swe-book. Of course, you can still find it available for purchase.

Cheers!