Jane Street·Quantitative Trader

Jane Street Quantitative Trader interview experience

No offer

Hard

Positive

New York, NYPosted Oct 2025 · Candidate report, summarized by Dataford

I got pulled into a short, fairly direct set of interviews for a Quant Trader Intern role.

The first round was virtual and immediately game-like: I was asked about two different probability games, each built around expected value thinking. After each game, there were one or two follow-ups that pushed me to justify the reasoning rather than just give a number.

The pacing felt like it moved fast enough that I couldn’t “stall” while I figured out how to model the situation. I did some work on the expected value parts, but the follow-up questions didn’t come together cleanly. I didn’t progress past this first round, and the whole experience felt like I was judged heavily on whether my

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