Initial interview was a phone interview. Then another phone interview with an HR person. Then a one on one with the first person who called. Then a 3 person back to back 1.5 hr interview. The first interview was just a chit chat to go over the position and my background. The HR was more in depth asking why I wanted to work there and what I could bring to the table. The 3 for 1 interview was somewhat structured with typical interview questions. The offer came shortly after that.