I'm surprised that nobody has mentioned pair programming. You may also try to propose Lunch and Learn sessions where an expert on a particular portion of your p

I'm surprised that nobody has mentioned pair programming. You may also try to propose Lunch and Learn sessions where an expert on a particular portion of your project teaches the rest of the team about their area of expertise (how to work in it, architecture, where code is located, etc...). Don't be afraid to ask someone to teach you or a group. Chances are good that multiple other engineers could benefit from the same information.