[frahs]

And that's why Google's recruiting has the extra step of a hiring committee which didn't meet the candidate. Interviewers fill out interview feedback based on how their interview went with the candidate, and there's guidelines to try to reduce bias (no gendered pronouns in feedback, the candidate's code is included as-is in the feedback, etc) and the committee makes the final decision based on the feedback.

Sure, what is included can still be slightly biased, but if you're talking about non-technical things at the beginning or end, it won't really make it into the technical interview feedback, and probably will have little to no effect on the committee's decision. At the end of the day, the problems you're asked have optimal solutions and your code will either work or it won't.