You apply and in case you get select you will receive an email to answer a questionnaire with 10 - 15 questions within an hour (in a timeslot of your choice). In case of success you have a second interview with the team.

After my application, I received an invitation for a telephone interview and then after that I participated in a data science hands-on task. Initially, I was quite positive about the whole interview process (fast, to the point, interesting hands-on task). But this turned negative. The recruiter promised me to send a feedback which he never sent. I discovered that the recruiter left the company. I tried to contact another recruiter at LinkedIn but received no reply. Protonmail does not give any email addresses of recruiters at the website so I see no way to contact them. Up to now, I did not receive any feedback and have the impression that this fast growing company cannot handle the large number of applicants.