In my career, the biggest factor in my growth as a developer has been working with better developers. To work closely with someone who is really good at what they do is the best education you can get.
This is a frustration I have with my current position. I'm the second most experienced person on the team, and most knowledgeable about our platform. And I'm...not that experienced or knowledgeable. Big fish, small pond has never appealed to me. It gives me no one to check my ideas with, and pulls me, as much as I consciously resist, down the path to being a know-it-all Dunning-Kreuger assbutt.
