Cloud native application architectures focus on building applications as microservices and running them on containers that run on dynamic orchestration platforms and utilize cloud computing functionalities. Agile DevOps and continuous delivery pipelines ensure agility and speed of application development and faster time to market. These systems follow a number of design principles to ensure they are built as loosely coupled services designed for cloud scale and performance. A core design principle is the use of APIs for application integration. Underlying cloud orchestration layers provide certain functionalities for integration via APIs - be it RESTful or internal formats such as Protbuf, Thrift, gRPC, NATS, etc. APIs thus play an important role for both internal services communications as well as integration between composite apps. A cloud-native API gateway that also provides features of a full lifecycle API Management is key. In this deep dive workshop, we look at the concepts of cloud-native app integration via APIs which utilize cloud-native API management. We focus on the architecture, design concepts followed by the implementation of API led microservices and then look at the runtime component which includes DevOps, CICD and hybrid clouds.