Citadel·Software Engineer

Citadel Software Engineer interview experience

No offer

Hard

Neutral

United StatesPosted Oct 2025 · Candidate report, summarized by Dataford

I started with an OA that was less about a couple simple test cases and more about hidden correctness and efficiency.

The setup gave me two questions with easy visible tests, but most of the evaluation was hidden—if my approach wasn’t efficient, I’d fail even if I could get some tests passing. The time and optimization constraints were real, and it definitely shaped how I tackled the problems.

The style of the questions matched the LeetCode tag area the role seemed to care about, but with enough modification that it didn’t feel like memorizing a known problem set. One OA included number theory, and I remember needing a solid grasp of modular arithmetic concepts like handling mod properly. Overall, the

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