Jane Street·Quantitative Researcher

Jane Street Quantitative Researcher interview experience

No offer

Medium

Positive

United StatesPosted Oct 2025 · Candidate report, summarized by Dataford

My first interview started simply: I had a brief Zoom conversation that focused entirely on two probability games.

Each problem was broken into a small set of parts—one question had multiple sub-steps and the other was shorter, but both required careful reasoning through the probabilities.

When I got stuck, the interviewer didn’t just leave me hanging; they gave me thought directions to help me find the next step. It felt structured, like the goal was to see whether I could correct course and keep explaining how I was thinking as the problem evolved.

Overall, it didn’t feel impossibly hard, and the interview moved quickly from the opening into real problem-solving. I ended the session with time to ask

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