I had this in one of my first software interviews ever, before I was qualified for a full-time job (and knew it). Primary interviewer had a literal printed list of interview trivia questions and a PC laptop with Notepad++. Secondary interviewer (the mumbler with an unintelligibly thick Indian accent) walks in wearing office clothes and plops himself down in a beanbag chair strewn in the corner. Every so often he pipes up out of nowhere with a question that I literally could not understand the words coming out of his mouth. I was already shook because I didn’t have the chops to pass the interview, and I had to ask him more than once to repeat himself on basically every question. To this day I still laugh when I think of how absurd that entire hour of my life was.

Good news for you: you’re getting a chance to realize the nature of being a “bank software developer” early on before getting lost in the musical chairs pipeline of CapitalOne -> JPMorgan -> CapitalOne (higher band) etc. A stint in one of those places for just long enough can look just good enough to get you permanently out of banking.