A Backend-for-Frontend (BFF) is a specialized server-side API that serves as an intermediary between the frontend (client-side) applications and various downstream APIs. BFFs shield your frontend from the complexities of dealing directly with diverse (and potentially inconsistent) data sources.
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7 Key Lessons I Learned While Building Backends-for-Frontends1. Understand that you’re not building an API Gateway.2. Consider using a BFF framework.3. Caching, Auth, and Logging work great in the BFF layer.4. Normalize Your Errors in the BFF.5. Integration testing gives you the best bang for your buck in the BFF.6. Don’t worry about DRY.7. Documentation is going to be an ongoing chore.Conclusion15 Impressions