2 - hour phone interviews broken up into four 30 min segments, 3 of them with managers, and last one with HR rep. Mostly questions about my research experience. Received offer but did not accept due to better offers at other companies.

Four rounds of technical interviews, including team members, managers, directors, and senior fellows. Interview times are around 30 minutes. The interview lasted about 2 weeks, and waiting for the offer for one month.