> I find their hiring process as a bit of a red flag
This is a bit like saying you find the hiring process at the NFL or for SEAL teams a red flag. You either fall through the selection sieve or you don't, that's the whole point. The filter has served its purpose, and they end up with the elite high-performing teams they desire. There's nothing wrong with you or the filter if you don't make it. The filter clearly does work because Jane St prints cash like the Fed and is one of the top MM firms out there.
I understand the perspective, although it's different and not really comparable to those other things you mentioned, especially since the NFL and the SEAL teams do not evaluate people solely based upon a few hours of tunnel-visioned interviews. They are primarily evaluated on their performance in real-life scenarios and training across a decent amount of time.
Of course Jane Street is successful! There's no question there. However, I don't think it's much of a question that they probably miss out on some great candidates that don't fit into that type of hiring process. It's possible they view those as acceptable losses.
This is a bit like saying you find the hiring process at the NFL or for SEAL teams a red flag. You either fall through the selection sieve or you don't, that's the whole point. The filter has served its purpose, and they end up with the elite high-performing teams they desire. There's nothing wrong with you or the filter if you don't make it. The filter clearly does work because Jane St prints cash like the Fed and is one of the top MM firms out there.