Jane Street·Quantitative Researcher

Jane Street Quantitative Researcher interview experience

No offer

Hard

Negative

London, EnglandPosted Jul 2025 · Candidate report, summarized by Dataford

One of my experiences stood out because it barely felt like a finance interview at all.

I got rejected after a kind of game/card-style interaction where the main skill was pure math. The task was absurdly focused: I had to compute the steady state of a Markov chain in my head, and I remember feeling like that was the entire point—no discussion of financial skills, just a brutal mental-math requirement. It honestly felt like a waste of time to me.

In a separate call that went much more like what I expected, I was called by a trader and asked several probability questions, including work connected to confidence intervals. That one was still rigorous, but I was supported with

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