The diversity thing is really hard to do anything about. I think I've seen maybe 10-15 relevant (in the loosest sense: person was a dev of some sort, not a career switcher) CVs from a woman over my entire career. And I did hire three of them, compared to dozens of men and thousands of CVs. Perhaps my estimate is wrong or something, it's hard to keep track of this number, but I do tend to give it an extra good look when it's a woman just because it's so rare.

I think it's the pipeline as well as selection: I work in finance and usually in smaller firms.