Bernd Rücker

Co-Founder and Chief Technologist at Camunda


Loosely or lousily coupled? Understanding communication patterns in microservices architectures
distributed systems
remote communication

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In a microservices architecture, services shall be as loosely coupled as possible. Still, they need to communicate with each other in order to fulfill business requirements. Now there are so many questions around this communication:

  • What are the general possibilities to communicate? For example synchronous, asynchronous, or event-driven communication. What are the tradeoffs and which communication style should you prefer?

  • What is the influence on the coupling of your services? For example, asynchronous communication reduces temporal coupling between services.

  • What do I have to consider when selecting a certain communication style? For example, you need to apply certain resilience patterns if you want to use synchronous communication.

This talk will help you answer these questions for your project. You will better understand not only the architectural implications but also the effect on the productivity of your teams.


I am a software developer at heart who has been innovating process automation deployed in highly scalable and agile environments of industry leaders such as T-Mobile, Lufthansa, ING, and Atlassian. I contributed to various open-source workflow engines for more than 15 years and I'm the Co-Founder and Chief Technologist of Camunda – an open-source software company reinventing process automation. I am the author of "Practical Process Automation" and co-author of "Real-Life BPMN". Additionally, I am a regular speaker at conferences around the world and a frequent contributor to several technology publications. I focus on new process automation paradigms that fit into modern architectures around distributed systems, microservices, domain-driven design, event-driven architecture, and reactive systems.