Stage 1: 20 minutes interview with one of the director. Questions about my background and motivations. It was just a first contact and the director told me I was going to be invited to a maths and coding test to do on premises (during COVID period...) They have never contacted me again after that. I have tried to contact them several time by email the following weeks but no one took the time to answer me and update me about the process. I would not lose my time interviewing with them if I would have known how poorly they treat the candidates. Avoid interviewing with them!