> While the guy is brilliant, I doubt he could fit the role of senior/staff/principal engineer in any one-level-below faang kind of company.

Maybe but what’s the point? Hell, I might guess he is terrible at jiggling and basket weaving, too. Complete failure as wrestler, even. But that is kind of neither here or there. Or is it you think staff title at faangs is some kind of pinnacle position every engineer should strive for? It actually always strikes me as a funny title. In college when they didn’t have a specific professor to teach or just going to use a grad student they put “staff” in the name box so in my mind it’s associated with a random lower rung student who couldn’t get away doing just research.

Yeah, staff engineer is a pinnacle "still doing engineering and maybe leadership but not management" position in engineering firms. The academic "staff" is just a "not really one of us" gatekeeping-the-servants title.