API Gateway Explained: How It Brings Order to Microservices Architecture

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An API Gateway acts as a single entry point between clients and backend microservices, handling routing, authentication, rate limiting, and response aggregation in one place. Without it, each microservice must independently manage cross-cutting concerns, leading to scattered logic and inconsistent behavior. Common deployment patterns include single-instance setups for small teams, clustered configurations for high-availability production systems, and Backend-for-Frontend (BFF) models tailored to specific client types like mobile or web. Each pattern involves trade-offs between simplicity, scalability, and operational complexity. Choosing the right pattern depends on team size, traffic demands, and how diverse the client ecosystem is.

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