Explore the modernization of rule and workflow engines for serverless environments in this conference talk from Devoxx Poland 2019. Discover how project leads from Drools and jBPM transformed their Java-based projects to be compatible with cutting-edge technologies like GraalVM and Quarkus. Learn about the challenges and solutions involved in adapting code that heavily relies on reflection, dynamic class loading, and other advanced Java techniques. Gain insights into practical use cases demonstrating how these adaptations enable rule and workflow engines to become integral parts of cloud and serverless architectures. Understand the potential of rule and workflow engines beyond traditional enterprise software applications, and how they can be leveraged to separate domain-specific constraints from main application flows in modern, lightweight environments.