I only got the call back for the video interview via modernhire, not the face to face interview, Although I didn't make it to CERN, it was a pretty good experience.
J'ai postulé en ligne. Le processus a pris 2 mois. J'ai passé un entretien chez CERN en oct. 2021
Entretien
It was asynchronous. I had to answer to various question about how much I know about cern and my project. It was a little bit akward but not difficult. Therefore some people from specific team can call you for a more specific interview.