Jane Street·Software Engineer

Jane Street Software Engineer interview experience

No offer

Easy

Negative

London, EnglandPosted Mar 2026 · Candidate report, summarized by Dataford

I took an OA that was scheduled for an hour, and it immediately felt strange.

The interviewer showed up late and seemed unprepared, and the whole session felt like it started and ended without a lot of warmth.

When I suggested we do brief introductions to understand each other’s backgrounds, the interviewer shut it down and we jumped straight into the question. The task was described as something like a LeetCode easy, and the interviewer emphasized that correctness in implementation was valuable. I implemented a minimal solution using a functional programming approach, and the interviewer initially didn’t fully understand it.

As I tried to explain the approach in

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