The rockstar shit is a filter for me. If a company advertises itself as wanting rockstars, ninjas, "hardcore" people, or whatever brogrammer bullshit of the week is, I put that job advert to the bottom of my list. The thought of working around the sort of people who would apply because they consider themselves a hardcore ninja rockstar puts me off. (I spent more than enough time with homophobic macho fuckwits when I was at school, I'd rather not have to deal with them at work.)

There are gendered problems in tech: social bugs, really.

There's the putting-yourself-forward problem. I was at an event a while back and ran a birds-of-a-feather session on open source geo stuff (I'm an OpenStreetMap editor). At the session was a woman who is involved with a startup in the same area, but she didn't seem to have the confidence to run the session, even though her involvement in open source geo is much higher than mine (I just piss around editing maps). Ensuring that our community institutions invite women in is a good step: they don't have to accept the invitation, but many will. And that's good.

Another problem some women I know face: social expectations. They have to dress more masculine in order to be taken seriously at real-life gatherings. We as hackers like to say we don't judge people based on their appearances but based on their code. Then at the same time, we like to judge the "suits". I know women who have said they have to go home and change out of feminine wear (of all levels of formality) into jeans and a t-shirt in order for the hacker crowd to take them seriously. If a guy turns up to an event in a suit, people will just naturally assume he needs to wear it because he's doing coding in some kind of corporate environment. But if women turn up in a dress, they just get the presumption that they are in sales or PR or something. That's bullshit. (This stems from the geeky hackery idea that dressing nice makes someone untrustworthy. Sorry, no, I've worked with utter assholes who come to work in jeans every day, and I've worked with people who are awesome, ethical and never fuck people over who–gasp!–wear formal or dressy clothing.)

Is there an endemic problem of malicious deliberate sexism? No. That exists in some companies, sure, but I don't think that's the primary problem. Instead, there's lots of little nagging bugs, some of which stem from unconscious attitudes perpetuated by geek culture. The sexism problems such as they are consist of lots of little nagging bugs that taken together exclude women. Unless you are some kind of hardcore misogynist, fixing them will have generally positive side effects for everybody.