The process constists in a Codility online test and a pre-recorded video presentation. There is normally interviews after this, but I did not pass the first step. It is not clear to me why I did not pass the first round since I believe I perfectly solved the (easy) programming test on Codility. I think it is more the fact that I mentioned I changed my job several times in a few years, or anything on my resume that was not to their taste. They did not explain why I have been pushed aside except mentionning that they were impressed by my credential and experience although they have had a competitive pool of candidates (probably a standard formula to reject someone).