The selection process is long and time consuming on the part of the candidate but it is very stimulating. In my case it lasted more than 4 months but it depends on various factors. Send CV and cover letter, if you pass the selection you are contacted to perform a series of tests (mainly logic) that have variable duration but in all take about 6 or 7 hours depending on the role. If you pass the tests then you are contacted to make a first cognitive interview with the recruiter. If you pass the interview you are contacted for a slightly more technical interview with some future colleagues. A couple of contacts are also requested as references. If you pass all the steps then you are made a proposal which if accepted leads to the drafting of the contract.