Designing Microservices in Functional Style

Event sourcing, CQRS, Microservices, they are all concepts that share a natural affinity with the fundamental idea of functional programming: defining complex behavior through the combination of elementary transformations.

The real surprise is how well they work together. Not only we can build a very powerful and scalable application, but it is even simpler to build than the traditional Object-Oriented approach. I will present what we learned from our experience: our problems and how we solved them.

At the end of this talk, you will know the basic rules to architect a system using functional programming principles for microservices with CQRS and Event Source without using any framework. We will discuss what are the benefits of this approach and the dangers and difficulties that it is better to avoid.