First interview with Director and VP - very informal and easy going, followed by a case study presented to the extended team - which was awesome to get to know the spirit of company and team and finally a Skype interview with HR. In the first interview there were some real good cop bad cop vibes and I felt that they were testing me and my calms - which I was able to keep. Also, HR sounded very rude over mail but turned out to be super nice on the call itself - so don't be put off or get nervous.