Citadel Securities Software Engineer interview experience

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Medium

Neutral

SingaporePosted Sep 2025 · Candidate report, summarized by Dataford

My interview started with C++-related questioning, including topics like virtual functions and what C++ features I liked enough to explain.

After that, I worked on implementing a vector, which made the round feel very language fundamentals-focused rather than purely algorithmic.

From there, I ended with LeetCode-style problems that were described as easier. Another part of my process also included a different LeetCode medium challenge where I had to talk through my approach with the interviewer, using a platform prompt, rather than going straight into typing without discussion.

Overall, the experience felt average in difficulty, and the flow was pretty interactive—especially in the parts where they asked me to justify the

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