According to the meeting, I got to know the team leader. He suggested to have a try. I was contacted by HR after one month and he arranged the interview schedule. The interview took almost one-day by a group of 7-8 technical persons. After the technical interview, I talked to HR and fill some tables.

They gave me 3 hour advanced algorithm exam (1 problem). ACM-ICPC style problems but you have to implement all the things that you would use (sort, data structure, etc). Brush up your knowledge about graph algorithms and data structure.