After submitting my resume and answering a few questions on past projects, job preferences, etc. I had two Skype interviews on algorithmic questions. The problems posed were quite fair and had to be solved in a programming language of choice in an online editor. After that, I was invited to an on-site interview in London (expenses paid) with three more one on one interviews. Two of them were once more on coding, this time on a white board. The other one also had a small coding part but also included questions on previous projects, team behavior etc.