I applied and was contacted soon after by the recruiter. There was a phone screen, onsite interview with the lead and a take home assignment. The process was informative and challenging, you get a good sense of the culture through their questions and the people you meet.

Only talked to recruiter. Everybody who is considering applying for the postion should be careful: 1. The same postion they post it in London，Tallinn，Budapest - but the salary is paradise and hell. This is not fair. Maybe finally they always tend to hire one in the cheapeast location . 2. Pay attention some location for instance like Tallinn office might tend to hire locals except IT department or lowest paid role like customer support. 3. Private personal referal might make the hiring process less fair and transparent.