REST BFF
REST BFF (Backend for Frontend) is an architectural pattern where a dedicated backend service is created for each frontend application or client type, such as web, mobile, or desktop. It acts as an intermediary layer between the frontend and multiple backend microservices, aggregating data and handling client-specific logic to optimize performance and user experience. This pattern simplifies frontend development by providing tailored APIs that match the exact needs of each client, reducing over-fetching and under-fetching of data.
Developers should use REST BFF when building applications with multiple frontend clients that have different data requirements or performance constraints, such as in microservices architectures where direct client-to-service communication becomes complex. It is particularly useful for mobile apps needing optimized payloads or web applications requiring aggregated data from various services, as it decouples frontend evolution from backend changes and improves load times by reducing round trips. This pattern helps maintain clean separation of concerns and enhances scalability in distributed systems.