Citadel Securities Software Engineer interview experience

No offer

Hard

Positive

AustraliaPosted Dec 2024 · Candidate report, summarized by Dataford

I started with a difficult online assessment on HackerRank with two problems that required strong algorithm knowledge.

Once I moved on, the first technical interview focused on graph theory and optimization, and the bar was high—I got pushed for better solutions throughout, not just asked to produce something that worked.

The overall feel matched the first stage: intense, detail-oriented, and time-boxed. The first round also included two technical questions on HackerRank, with one explicitly graph-related and another that could be handled with a heap-based approach, and that whole block ran about an hour and a half. I didn’t end up getting the offer, but the experience was challenging in a very specific

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