With a working user experience and visual design in-hand, UFCU had made considerable progress developing the consumer facing aspects of the product. However, much of that work had occurred largely devoid of engineering input and validation against real world technical and process constraints. Eureka quickly identified these gaps, tightened up relevant use cases, updated user experience models, and proposed an application and engineering process design that could accommodate the iterative design strategy needed to support the project. We went to work, and by the end of this process we had a living style guide, a viable technical architecture, a baseline library of components that we could use for rapid development and experimentation, and a fully functional toolchain and deployment pipeline to support our ability to do so. Since a key element of the design strategy was to start small, test, and iterate using real world data and user feedback, we paid particular attention to instrumentation, monitoring, analytics, and operational reporting. With this approach, we were able to design and develop our processes around constant change, early detection of issues and successful execution of the design strategy.