  The microservices paradigm aims at changing the way in which software is
perceived, conceived and designed. One of the foundational characteristics of
this new promising paradigm, compared for instance to monolithic architectures,
is scalability. In this paper, we present a real world case study in order to
demonstrate how scalability is positively affected by re-implementing a
monolithic architecture into microservices. The case study is based on the FX
Core system, a mission critical system of Danske Bank, the largest bank in
Denmark and one of the leading financial institutions in Northern Europe.
