I also worked at a top quant firm, and as others have mentioned no one is a sociopath lol, but they are really smart. Also quant interviews are harder than FAA

I also worked at a top quant firm, and as others have mentioned no one is a sociopath lol, but they are really smart. Also quant interviews are harder than FAANG, but not because they require math. Maybe that is the case for QR or Trading interviews, but I've interviewed for SWE positions at multiple places (Citadel, JS, HRT, Optiver, IMC, etc.) and none of them asked me complex math theory. SWE interviews (at some places) ime are harder since they focus not only on algorithmic thinking, but deep knowledge on how your program and language work. Questions like: "How does malloc work at a OS level", "implement this STD object/data structure", "how does python garbage collection work", and OS questions are typical things to be asked. If the interviews are algorthmic focused, the questions are usually harder than FAANG leetcode and require a clean and correct solution with minimal hand holding.