Citadel

I had an onsite interview at Citadel, which was somewhat marred by the interviewer's late arrival and demeanor. I was asked a challenging problem involving merging sorted streams with stateful aggregation, which I had fortunately practiced before.

I participated in the Citadel Online Assessment for a 2025 Internship and encountered a challenging algorithmic problem focused on modular arithmetic and combinations.

I had my first round interview with Citadel for their NXT program, where I was asked to design a data structure for finding the median from a data stream. Despite feeling the session went well and providing an optimized solution, I was rejected.

I had a phone screen with Citadel where I was asked to implement a Trie and its supporting functions, followed by an optimization question and a bonus question to find the longest prefix. I cleared the round.