Jane Street·Software Engineer

Jane Street Software Engineer interview experience

No offer

Medium

Neutral

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

My journey started with the usual screening flow, and then I moved through multiple technical steps: a leetcode-style medium-ish coding round on top of an onsite system design interview.

The process felt a bit costly because it took a whole day, and by the time I finished the onsite portion, I was genuinely tired.

In the interviews, the tone was professional but there were a couple of things that stood out as frustrating or surprising. One interviewer asked about my origin, and it came off as discriminatory to me. Another struggled to read C++ even though that was my language, which made me feel like I had to compensate with tooling choices. I also ran into a strict expectation that I shouldn’t discuss the questions later.

I didn’t end up getting an offer. Afterward, what

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