Mobile apps are powered by APIs, and the trend for building the backend is towards small, fast moving microservices. These granular backends aren’t always well suited to integration with mobile apps. Companies like REA, SoundCloud and Thoughtworks have been experimenting with patterns for developing Backends For Frontends (BFFs) to allow greater flexibility on both the client and the server. Stewart will talk about some of the concerns when building mobile apps and APIs and how the BFF pattern tries to address these.