This presentation is a case study from an architecture remake at Sirius International. We will tell you the story about going from a huge monolith that had hit the end of the road, to a set of very small subsystems. The story is about realizing "buzzwords" such as eventual consistency in an undramatic and stripped down way without a lot of ceremony. The different subsystems use different technologies, for example one is using HTML5, Angular, CoffeeScript, REST and the file system. What were the problems and the keys? The talk is not only about the technical perspective but, also about the team and the process, because everything matters. You will leave with a set of tools regarding what to expect, what to look out for and where to put the focus!