First interview: Motivational phone interview in english, with some really basic technical and company-related questions.
Second interview: Technical interview with two group member in hungarian. Thorough and deep questions on financial knowledge, some programming questions. Takes about an hour.
Third interview: Rather about moivation and character, with the VP, discussing the teams workflow and system. (english)
Fourth interview: Another technical interview, this time on phone, with one of the team members. Again, really thorough, with some redundance.
Everyone is really helpful and nice, seemed to be great to work with.