How do you recruit for user tests?

I feel I got lost in the maze of Google searches filled with advertisers and self marketing articles. Seems quite hard to find authentic information about user testing.

Where do you guys usually recruit subjects for user tests?

I'd like to test my service on 3-5 software developers with a few years of experience. I believe my needs aren't that extraordinary.

Do you guys offer money or a subscription to your service in return?

Thanks for the help. I'm a little clueless here.