I was referred by one of the engineers in DigitalOcean. First round - Call with recruiter: Pretty short call, asking how I know the engineer who referred me and a little about what I'm looking for. Second round - Video call with the hiring manager: Asked a lot of technical concept questions. Third round - Technical screen with an engineer: For the first part, I was asked to design a system. For the second part, I was given some requirements and asked to code a class to perform certain functions. Final round - Video calls with two engineers in the team and with Technical Program Manager. Includes an open-ended discussion about distributed systems, behavioral questions on how I work in a team and the way I work.