I have only done the OA part yet. But there are 3 section: OA, Tech Interview, HR Interview. The OA is very simple but there are many solutions. I feels like they focus more on your working process. Unlimited Time.
Autres retours d’entretien d’embauche pour un poste comme Systems Engineer chez Matic
The first step of the interview was to respond to a C++ challenge that I did not pass. The challenge is supposed to take few hours but that was not the case for me which by the way they are okay with it.