An effective way to Move your system to a microservices architecture is to start with identifying your Core services and then refactoring & decoupling them ... In a microservice-oriented system, maybe our domain is very big, which could cover many microservices and those microservices could function as sub-domains ... In this case below, it was decided to extract all the customer side of the application into microservices architecture and leave the admin side on the monolith, which is perfectly fine.