I found a technique that worked well for me. I want to share with you and others, but I don't want to come across as judging you in anyway. It's hard to find great candidates of any sort. And I wouldn't necessarily recommend my technique to every company, because it's just not reasonable in all cases.

I've found that the best way to get a good mix of people hired onto the team is to do more than hope that it happens.

I had to get out to workshops, conferences, and meetups. Local universities had groups that I got in touch with. I had to make connections with the communities that I was looking to hire from. It was a lot of hard work.

But once you've developed those connections, candidates roll in with surprising regularity for a long time. After two years I had a team of 10 great devs with a 50/50 split between genders and a huge range of background and cultures. It was the most fun team to work with and we made awesome stuff.