BFF Pattern: An Example

An online store shows the same product on three screens. A web page has room for everything. A phone shows a small card. A television shows one line under the picture.

Behind them sit four services: products, reviews, inventory and recommendations. The question is what stands between those services and the three screens.

One API for Everyone

The straightforward answer is a single API that returns the full product. Every client calls it and takes what it needs.

That answer has two costs, and the smallest client pays both.

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