Citadel

Surprisingly, the interview felt much easier than I anticipated. The technical rounds were straightforward, with a focus on design questions, like creating a thread-safe shared counter and a low-latency stock price time-series store. At one point, I

Here are some things you need to know about Citadel: * I applied to work for them over 10 years ago. They called up my current manager at the time and talked to him about me (without asking me). I was a little clueless about this at the time, even

One phone interview, followed by one on-site interview. There was a technical interview with five people, including two via conference call. Each interviewer asked technical questions, especially about algorithms and problem-solving approaches. I was