Starting off with the co-founder, he will introduce you about the company and interview you first. After that he will send you to the team you have applied for. The first person is usually the manager of the team. After talking to the manager, he/she will let you have the interview with other team members. Once you finish talking to everyone in the team, then you will move on to another team, but this time you won't be having an interview with everyone, just with the manager. After you finish talking to every team, including HR, you will go back to the co-founder. Most interviews take about 1-2 hours. So please spare your time for that! Please note that positions might change after the interview. The company tries to learn about you and find the position that suits you the most. Things are flexible here :)