Jane Street·Quantitative Trader

Jane Street Quantitative Trader interview experience

No offer

Hard

Positive

United StatesPosted Nov 2025 · Candidate report, summarized by Dataford

My interviews leaned heavily into technical, game-like expected value questions—especially dice games and probability problems that went from basic into genuinely challenging territory.

The first parts were still about EV reasoning, but they quickly tested whether I could handle the logic without losing track. I remember struggling most on the kind of expected value setup where you have to interpret what’s being asked before you can even start computing.

As the rounds progressed, I ended up getting drawn into more open-ended problem solving and decision-style questions. One of the sessions was an extended, nontrivial game where I needed quite a few nudges to keep moving, and the overall pace felt demanding enough that I couldn’t just “talk around” the math. There were also

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