Jane Street Quantitative Trader interview experience

It was about half an hour and immediately technical: I was asked two probability questions that were very expected-value flavored. One involved dice—specifically summing upface outcomes over multiple rolls—and the other asked for an optimal strategy.

The next piece of the process felt similar in spirit, with several dice-and-cards probability questions where expected value was the backbone. The questions were clearly designed to probe quantitative problem solving rather than trick memory. Even when the problem statements were phrased like puzzles, I was able to work through them by focusing