Explore a comprehensive case study on implementing testing in production at scale in a microservices architecture, presented by Amit Gud from Uber at SREcon19 Americas. Gain valuable insights into real-world testing in production architecture, focusing on large-scale integration and load testing. Discover the design considerations, building blocks of tenancy, context propagation, and infrastructure components necessary for successful implementation. Learn about Uber's scale, microservice architecture, and capacity planning strategies. Examine the concept of services in production, tenancy extensions, and final thoughts on this increasingly viable solution for large-scale organizations.