Stop it with the 7 rounds of interviews. Assume after some discussion and basic verification that the person isn’t lying about past experience. Hire the first candidate that passes your bar instead of interviewing and ranking 20 candidates.
If it turns out that you have hired every tech employers worst nightmare, a person with great experience who can talk everyone into believing they know what they’re doing but can’t code their way out of a paper bag, fire them.
Trust me, it’s faster, takes less manpower than 7 rounds of interviews with 20 candidates, and in my experience produces better results.