With the growing demand for robust and scalable software systems in enterprise settings, a deeper understanding of distributed patterns becomes essential. This thesis investigates the design and implementation of microservices pattern using principles like Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), and Event Sourcing. It also studies the application of technologies such as Axon and the NATS messaging system, both of which can be employed in environments that require efficient management of high-volume events. The research presents a practical study of a system composed of four microservices, which communicate through events associated with Interception Related Information (IRI) and phone calls.