DeveloperWeek Europe 2021 DeveloperWeek Europe 2021
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Carving Microservices Out of the Monolith with Domain Storytelling

- BST
Workshop Stage 1
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Henning Schwentner
Workplace Solutions, Coder, Coach, Consultant

Henning loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions in Hamburg, Germany. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architecture. Microservices or self-contained systems are often the result. Henning is author of “Domain Storytelling – A Collaborative Modeling Method” and the www.LeasingNinja.io as well as translator of “Domain-Driven Design kompakt”.


For a microservices architecture to be succesful it is crucial to have the right boundaries between the microservices. But where are the right boundaries? I would like to present a tool that helps us answer this question.

Domain Storytelling (www.domainstorytelling.org) means that we let our users tell us stories about their work. While listening, we record the stories using a pictographic language. The experts can immediately see if we understand their story. After very few stories, we understand the language of our users and find different areas of the domain. Each of these areas (called a subdomain) is a good candicate to become a microservice in our architecture.

In this talk I show how to find subdomains and which heuristics can help us.