Jane Street Quantitative Trader interview experience

Every interview leaned heavily on probability and game thinking, framed around games the interviewers presented. In the first round, the games felt more straightforward and closer to deterministic setups, but the later rounds ramped up quickly with more randomness and heavier game theory.

By the time I reached the rounds where the game structure was more open-ended, I had to optimize outcomes like maximizing profit or minimizing loss, and I had to keep track of my own approach as the difficulty increased. The interviewer’s hints were limited; if I got stuck, I still had to show how I was