Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Citadel Securities
Colloquio
1 online assessment and 2 rounds good experiences but long. The first round is 30 minutes with one engineer, the second round is 120 minutes with 3 interviewers. The process is not long
Domande di colloquio [1]
Domanda 1
leetcode question (medium-hard) for first round and in the second round, some behaviour questions, some question related to oop
Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Citadel Securities (Sydney) nel mese di giu 2026
Colloquio
The process includes 4 technical interview and 1 final behavior interview, the primary language is Python. You will scheduled for next round if passed previous round, I failed on 2nd round
Domande di colloquio [1]
Domanda 1
1st round: questions about tcp/udp, heap, queue, thread/process + coding exercise about parse file
2nd round: ask about project experience, implement decorator
Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso Citadel Securities (Chicago, IL) nel mese di feb 2026
Colloquio
First round is behavioral and technical and second round is superday. Then is final round and team matching. Superday was virtual and 45 min each, all same format, with beginning behavioral questions, a huge chunk on system design, and final questions at the end.
Domande di colloquio [1]
Domanda 1
System design, create a stock options book using dict
Ho sostenuto un colloquio presso Citadel Securities
Colloquio
Went through 4 rounds of technical interview + 1 round of leadership round.
This was for a C++ internship role. Process and questions were very dependant on your interviewer, but it is definitely C++ heavy and should be familiar with low level stuff