Cloud Native Application Design – Backend For Frontend Pattern

When working with applications for which frontend is available in more than one medium, for example, a desktop and a mobile application. The scenario can be complicated when the Application has different mobile versions for Android and iOS. Also, the APIs might be consumed by third-party services. In short, the same set of APIs has other consumers, which might have different requirements out of them.

One way to solve the problem is that the API being called checks the source of the call and replies with the required data for example for a GET orderdetails call, a mobile call might need just order history listing, whereas a desktop frontend might want to show more information as it can accommodate more on the interface. At the same time, we just want to expose a piece of limited information to a third party caller.

General Purpose API vs BFF

The image above shows very well, how the BFF pattern helps customize responses for callers.