Did you, in your "proven career", ever work on the systems the size of Google Cloud and having same amount of users?
Because cheap stuff you can run away with on 1mil users suddenly falls apart when you need to serve more across continents and suddenly you kinda need to know what all those words in documentation actually mean.
Also, as for CV, everytime I've interviewed people I've gotten more than I few people that lied in their CVs. Persumed "senior developers" who couldn't do a fizzbuzz in their chosen language and tooling. CVs are utterly worthless from interviewers perspective - there will always be someone with exact same CV like you have but will be utterly incompetent.
Because cheap stuff you can run away with on 1mil users suddenly falls apart when you need to serve more across continents and suddenly you kinda need to know what all those words in documentation actually mean.
Also, as for CV, everytime I've interviewed people I've gotten more than I few people that lied in their CVs. Persumed "senior developers" who couldn't do a fizzbuzz in their chosen language and tooling. CVs are utterly worthless from interviewers perspective - there will always be someone with exact same CV like you have but will be utterly incompetent.