Microservice architecture, layered structure, modular design, hexagonal architecture, event-driven design, request-response pattern, repository pattern, unit of work pattern, factory pattern, abstract factory pattern, builder pattern, prototype pattern, facade pattern, adapter pattern, bridge pattern, composite pattern, flyweight pattern, proxy pattern, chain of responsibility pattern, command pattern, iterator pattern, mediator pattern, observer pattern, state pattern, strategy pattern, template method pattern, visitor pattern, MVC architecture, RESTful API, cloud computing, distributed system, scalable system, high availability, load balancing, fault tolerance, real-time data processing, event sourcing, CQRS, serverless architecture, service-oriented architecture.