A’s Hire A’s, B’s Hire C’s.
If you're really a senior developer, will you enjoy to work with C's?
Try to actively «fire» the interviewer at the first minutes of interview by showing the darkest points of your CV upfront. If you succeed, you will save 6 hours of hazing and a few months of your life after that.
I was in a team with inexperienced PM and few crooks, which negotiated 2x salary over mine, but had no skills. They hated programming, actually. I tried to help, but PM fired me instead. The project collapsed, so they started to blame me, damaging my reputation. It was an awful experience.
For me, it's easy to recognize the technical level of somebody else, because I will just ask a high-level question and then see how the discussion goes. If they say «Okey, now tell me about your experience», then they are definitely not A's.