The HR called me and we scheduled an online interview. in the first interview I met a Senior software developer who explained technically about the job and the company, and asked a question: Given an array with a subsequence numbers, starting from 1, find the missing number: [1,2,3,5] - the missing is 4. The second interview we had with two developers and we had a system about a booking flight system. They were pretty nice and knew the job. We talked a little bit about design, SQL and it was fun. The third technical interview included a design of an ad clicker system, and then writing a part of this system design in code using your favorite language.