First step was a Codility timed exercise with three questions. They then invite people who make it through to an on-site. I have not made it that far, so can only attest to the first part.
Questions d'entretien [1]
Question 1
One question was to take a string of a day (ex: Monday) and add a number n days to it, and return a string of whatever day that was.
Started with a simple Hackerrank coding interview that you have to finish within 60 minutes.
There were three algorithm questions and I apparently did not have to worry about efficiency.
They give you around a week to complete the interview