Microservices

Microservices is an architectural approach where applications are built as collections of small, independently deployable services, each responsible for a specific business function. Each service runs in its own process, manages its own data store, and communicates with other services through well-defined APIs, typically REST or message queues.

The primary advantage is organizational and operational independence. Different teams can develop, test, deploy, and scale their services independently using whatever technology stack best fits the problem. A payment service can be written in Java while a recommendation engine uses Python, and each can be deployed on its own schedule. When one service fails, the others continue operating, providing fault isolation that monolithic architectures lack.

For web development teams, the decision to adopt microservices involves significant tradeoffs. The architecture introduces distributed system complexity: network latency between services, eventual consistency challenges, the need for service discovery, and more difficult debugging across service boundaries. Microservices work best when the organization is large enough to staff independent teams for each service. For smaller teams, a well-structured monolith is often simpler and more productive than a distributed system with all its operational overhead.