Data structure implementation, a lot of optimization stuff. Began with introductions, they ask some soft skills, ask about some stuff on your resume. They also asked why you want to work for Citadel.
Implement a heap, language of choice.
The following metrics were computed from 47 interview experiences for the Citadel SWE Intern role.
Citadel's interview process for their SWE Intern roles is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Citadel's SWE Intern interview process.