Can you list common architectural patterns for microservice systems?

Common architectural patterns for microservices systems include:

• API Gateway — a single entry point for all clients, routing requests to appropriate microservices, and possibly performing authentication, data aggregation, and caching.
• Database per Service — each microservice has its own database, ensuring data independence and isolation.
• Event-Driven Architecture — microservices communicate through events using message brokers (e.g., Kafka, RabbitMQ), increasing asynchrony and scalability.
• Circuit Breaker — a pattern for handling failures in remote services, preventing cascading failures.
• Service Discovery — automatic detection of microservice addresses in a dynamic environment (e.g., with Consul, Eureka).
• CQRS (Command Query Responsibility Segregation) — separating read and write operations for performance and scalability.

These patterns help build reliable, scalable, and maintainable microservice systems.