There were 3 rounds of interviews- 1st round was over the phone, the other two were in the Boston office. I met with 10 different people on the team, who were all really nice and fairly relaxed. They asked a lot of behavioral questions and also asked me to describe a complicated concept in layman's terms. They gave a lot of background about what the role entails and what kind of work they do. After the third round, I heard a few hours later that day.