Jane Street·Software Engineer

Jane Street Software Engineer interview experience

No offer

Negative

Posted Jul 2026 · Candidate report, summarized by Dataford

My first interview at Jane Street was a single technical coding task split into two parts.

I got through part one, and then I focused on part two where the clock really started to matter. I ended up needing a couple of hints about bugs, and with those nudges I got part two finished in about 55 minutes.

After the main solve, I spent time optimizing and cleaning up the solution so it was easier to reason about. The interviewer atmosphere felt practical rather than flashy—more about correctness and clarity in how I approached the problem. Still, I didn’t advance; I was rejected after that first round.

The most memorable piece was how directly the hints affected progress, and how

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