I worked for a large investment bank directly comparable to GS. I was a data and systems analyst that ended up doing pseudo-SWE work in addition to my other responsibilities. The interview process was stiff, rigid, felt outdated and very intimidating.
Ended up getting the job coming from a no name school with minimal experience. The reason why I got it, and why I seem to obtain most of my jobs, is because people say I'm "likeable". To this day, I have no idea what that means in the context of software development, investment banking, or technology in general as I work strictly behind the scenes and never in a client-facing capacity.
I will say, it was the best job I ever had; albeit, our dress code was always full business suits and printers and fax machines were still used. My boss ended up becoming a phenomenal role-model and mentor and taught me how to think critically about my work.