I applied online.
Initial phone interview.
Superday with 3x30 mins interviews. Teams picks you out and interviews you. Largely just medium/hard LeetCode style questions. Interviews usually start with them asking a few technical questions about your CV.
LeetCode medium / hard
The following metrics were computed from 1 interview experience for the Citadel SWE Intern role in London, England.
Citadel's interview process for their SWE Intern roles in London, England is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Citadel's SWE Intern interview process in London, England.