A nonstandard interview process like this is illegal in some jurisdictions. It may run afoul of US law too, depending on the outcomes.
It is safer and easier to use a one size fits all interview.
It is safer and easier to use a one size fits all interview.
Most of the interview is getting the candidate to show me that they know _something_ in depth and I'm not super concerned with exactly what it is. (If they've learned something in depth, I expect they can also learn the details of what we do. :) So the exact same questions to every candidate serves no one's interests.
However, what you're describing sounds reasonable to me - you're offering the same overall interview structure, just tailoring the question to delve more into someone's bespoke experience. That's a hell of a lot more work than a one size fits all (ala leetcoding style) question - kudos to you.