> But a team of SWEs at different experience levels for the same role won't be different job descriptions.

Why would you put people with different experience levels in the same role? You'll have three classes of people, only one of them "happy", for the others it'll be too much or too little. You cannot put a junior in the same position as a person who wants to be tech lead?

I think maybe I'm misunderstanding what you're saying, because having one job description for those three roles don't make much sense as I understand it currently.