His username is "StavrosK", and his full name, Stavros Korokithakis is in his profile. If you weren't familiar with the name Stavros and didn't know the gender, you could google it and the first link would take you to his website which shows his photo.
I don't see the 'deeply ingrained prejudice' here.
I re-read the parent, and nowhere does it say nor imply that the CTO nor the people he hired were male. For all that we know, the site might be built by bimbos scratching one of their own itches.
I wouldn't bet on it, of course, but I'm amazed to see that prejudices are so deeply ingrained that:
* you read what was absolutely not written;
* nobody noticed.