J'ai postulé en ligne. J'ai passé un entretien chez Citadel Securities
Entretien
Started with a bunch of technical questions and follow up questions based on the previous answer.
Then only left 20 min for coding question (leetcode hard). It is pretty difficult.
Questions d'entretien [1]
Question 1
implement ring buffer structure, write and read function
J'ai postulé via la recommandation d'un employé. J'ai passé un entretien chez Citadel Securities (Londres, Angleterre) en oct. 2025
Entretien
Pretty straightforward, some computer architecture. Good prep goes a long way for this in fundamentals. Know your CV and be able to answer a grilling, explaining design decisions. Fair sum of leetcode for others, but I got implementation-style questions more focussed on low level concepts (network protocols, allocation etc)
Questions d'entretien [1]
Question 1
Why did you choose to use ___ (rare technology) in your last project/internship
J'ai postulé en ligne. Le processus a pris 3 semaines. J'ai passé un entretien chez Citadel Securities (Singapour) en sept. 2025
Entretien
The interview started with C++ trivia questions, which version I use and some features of it with internal implementations. The interviewer listened carefully to everything I said and we had good discussions. The coding question required quick thinking about which data structure would be best as per tc and sc.