First point is the ProcessWire forum (1) — there's a super friendly community always willing to help. Second, there is a developers directory (2).

There aren't a million dev adopters, but I actually see this as a benefit, because if you talk with someone from the forum, you'll see that most of them are highly experienced engineers. Core team members are in the US and EU.

1. https://processwire.com/talk/

2. https://directory.processwire.com/developers/