Ask HN: Where can I hire developers for my dinky bootstrapped startup?

I'm interested in some ideas, fellow HNers. I run a bootstrapped software business. It's small, but profitable. I want to expand the company, and I see myself (who's technical) as needing some hired help in expanding the codebase with features and maintenance of the code.

I've tried the usual routes in finding contractors and interns to see if they would make a good fit into the company. I'd say that I've had 0% chance of success in this.

Any suggestions on those who have made a similar journey from a company of 1 person?