The first interview was in Hangout, It has a small but relaxed feel. The interview was about one hour long, talking about the company, the products, the vision. We also talked about my experiences, what I've done, the issues I had, my way to handle problems. It was really nice, he answered all my questions was a good feeling.
The second interview was in the office in London, they gave me a visit of the office (which is really nice), explained every teams etc. After this I had the technical interview, my experiences, a technical test and some questions about how should I handle some cases.