At ING we have a microservices-based architecture. It certainly sounds cool, but how can we enable developers create innovative customer experiences even faster? How can they compose APIs in a functional fashion, reason about their system complexity and change functionality comfortably without breaking it? I'll talk about an open-source Scala library we developed to declare, verify and execute microservices-based orchestration flows. I'll demonstrate how: - to write a recipe for such a flow with an internal DSL (domain specific language); - visualize the recipe as a graph to communicate the steps of the process with business and technical stakeholders; - and run the resulting flow within a RESTful API in an event-driven architectural model; - talk about near future plans to develop an external DSL and host recipes in a serverless architecture;