Services are first class citizens

In the microservices world, services are first class citizens. Microservices expose service endpoints as APIs and abstract all their realization details. The internal implementation logic, architecture, and technologies, including programming language, database, quality of services mechanisms, and more, are completely hidden behind the service API.

Moreover, in the microservices architecture, there is no more application development, instead organizations will focus on service development. In most enterprises, this requires a major cultural shift in the way applications are built.

In a customer profile microservice, the internals, such as data structure, technologies, business logic, and so on, will be hidden. It wont be exposed or visible to any external entities. Access will be restricted through the service endpoints or APIs. For instance, customer profile microservices may expose register customer and get customers as two APIs for others to interact.