Everything started with a sample task on the hackerrank. I was in a good shape and in zero stress to work on it - so I solved it OK. Then there was a phone screening interview, and Booking recruiters gave me a choice on flight dates to get to the interview. Booking.com paid the flight and the accommodation in the hotel across the road from the office. Interview consisted from several 1-hour sections: 1. 1:1 company introduction with recruiter. 2. 1:2 algorithms 3. 1:1 lunch with my future mentor, who speaks my native language 4. 1:2 technical interview, in my case - iOS/Android 5. 1:1 interview with product owner, to see if I'm adequate and am capable of getting the monetization idea of the product