After submitting your resume online, most of the candidates will receive an automatic hackerrank invitation. It can be done any time within two weeks. Then the qualified people will get invited through email.
J'ai passé un entretien chez Citadel (Londres, Angleterre)
Entretien
Online assessment with 3 coding questions on bfs and stacks etc.
First round on a simple coding question with some basic CS questions on top of it and also asked many CV questions and motivations
Did not proceed after this round
OA then phone interview, discussed about experience, coding rounds, and some open ended questions afterwards. The last 5 - 10 mins was for interviewee to ask questions back. Didn't pass this round :(
I had an HR screen where they asked about my experience at my previous company and to prepare for C++ to talk with the hiring manager. They asked about why I got laid off at my previous company.