Except that interviewing.io interviews are specifically designed to be anonymous. This is even stated on their website. The interviewers do not see a resume or job history. As a candidate who's done a couple of interviews through them, the interviewers never asked anything about my background either. I don't recall even uploading a resume.
Yeah, but there's in-group jargon and technical approaches that FAANG and FAANG-adjacent engineers will pick up on. Just because you're anonymous doesn't mean you aren't unconsciously signaling your background to your interviewer.
Do you honestly believe this jargon is so unique to FAANG and "FAANG-adjacent" (that's a new one) SDEs that it can be used to pick them out, yet so secret it's not yet become industry-wide jargon?
