Explore the creation of high-performance service-oriented architectures in this comprehensive conference talk. Dive into building scalable microservices using Google's gRPC and Apache Cassandra in .NET, focusing on meeting the demands of Big Data and Internet of Things applications. Learn how to minimize communication overhead with gRPC and optimize time series data storage with Cassandra. Follow along as an IoT application is developed to demonstrate effective solutions for performance and scalability challenges. Gain insights into GRPC architecture, Cassandra's CAP theorem compliance, hashing architecture, replication factors, and consistency models. Discover the advantages of using Cassandra, compare it with DataStax products, and understand its limitations. Cover practical aspects such as creating keyspaces, connecting to clusters, and addressing security concerns in Cassandra implementations.