This document discusses developing modern applications in the cloud. It describes how to modernize applications by breaking monolithic architectures into microservices, using containers and serverless technologies, and implementing continuous integration/delivery (CI/CD) practices. It also covers using infrastructure as code and service meshes to improve communication between microservices and provide observability. The overall message is that cloud-native application development requires modular, automated, resilient architectures that can be rapidly and reliably updated.