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.

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.