As early GraphQL adopters, Ibotta spent large sums of engineering time around the design and evolution of GraphQL interfaces. As our understanding of this technology has matured, we realized it requires a radically different approach than the RPCs we’re used to. This approach is a paradigm shift that is driven from domain driven design. When coupled with our ideas, we developed a series of best practices that result in consistent, flexible, and expressive interfaces. We’ll substantiate these by evaluating their applicability in real world examples encountered at Ibotta.