[logicalmonster]

There's 1,000 potential reasons why you might be rejected for any job. It could be subtle discrimination, it could be not wanting to pay you what you're asking for, it could just be a crooked interviewer reaching for a reason to hire her friend over you, or it could be that they found somebody even better than you.

But the reality might be as simple as she didn't like you that much, just as you might not like random people for random reasons. People want to hire people they like talking to. Hiring is rarely as simple as Candidate A scored 19/20 on the tech questions we asked, but Candidate B scored 18/20 on the tech questions we asked, so we automatically must go with Candidate A if Candidate B seemed a lot more easy-going and cool to talk to.

If you sounded boring or rude to her or whatever or if your voice sounded unpleasant or whatever to her ear, maybe she didn't want to contemplate dealing with you 8 hours per day for the next few years. I guess the best thing you can do is try and figure out what makes your interviewer tick and try and bond with them over that. This is a tough pill to swallow for many of us introverts in the tech world who have to force themselves to be socially on for interviews, but this is part of the process unfortunately, particularly when not dealing with other super technical people in interviews.