Jane Street Quantitative Trader interview experience

The whole interview turned into two separate “games,” each framed around maximizing earnings, so the math wasn’t presented as abstract theory—it was about choosing actions under uncertainty.

I remember working through the steps and trying to reason out what strategy would produce the best expected result. The interviewer kept it tightly focused on probability as the engine of the problem.

I didn’t end up getting an offer. Looking back, the experience felt like a test of how comfortable I was turning probability reasoning into a clear maximizing strategy, and I didn’t land that as well as