Companies deal with integration problems in many areas and on many layers, and there are dozens of ways how to establish integration between systems, all with their individual trade-offs. However, loosely coupled integration does not only allow for designing independent systems that can be developed and operated individually, but can also increase the availability and reliability of the overall systems landscape – particularly by using asynchronous communication between systems. Once the foundational patterns for loosely coupled integration and asynchronous communication are understood, subsequent challenges are already waiting for architects. An area that stands out here is when you architect for creating or consuming SaaS and Micro-SaaS solutions. A fundamental difference is that you now need to integrate with systems outside your own contexts, environments, and sovereignty. Join this session to learn about the special reality of integrating systems in a SaaS world with the respective integration patterns. Based on a few fictional companies, you will then see how these patterns can be applied to real-world use cases. Finally, receive guidance on integration technology based on these examples, with a focus on cloud-native and serverless services.