Citadel Securities Software Engineer interview experience

No offer

Hard

Neutral

SydneyPosted May 2025 · Candidate report, summarized by Dataford

I completed the OA first, and once I finished that I was contacted to book a date for the first round technical interview.

In the technical interview, I got a bunch of theory questions covering a wide range of topics.

The questions touched on OOP, design patterns, operating systems, and data structures and algorithms. After the theory portion, I had about 30 minutes to complete a live coding problem.

I didn’t receive an offer. What stood out was that the round tested breadth: it wasn’t only coding, and it required recalling concepts across multiple CS areas quickly and explaining them clearly.

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