Making Event Sourcing easy
De Bazel, Amsterdam
October 1 - 2, 2025
Event sourcing isn’t new—but making it easy, scalable, and practical for real-world systems? That’s where the magic happens. At its core, event sourcing gives you the full story—what happened, when, and why—so you can build systems that are not only resilient, but deeply understandable.
For the fourth year in a row, we’re bringing together the sharpest minds in event-driven architecture to move the conversation forward—not just around tools, but real-world tactics.
This year’s conference will feature:
- Stories from the trenches: raw, unfiltered lessons learned from teams scaling event-driven systems in production
- Workshops, masterclasses, and keynotes: hands-on sessions, deep dives, and expert talks to level up your skills
- Strategic sessions: from convincing stakeholders of the business value of Event Sourcing, to exploring its intersection with AI and life beyond Axon
- Networking: connect with developers, architects, and CTOs shaping the future of event-driven systems from some of the most recognizable company names in the world.
We’re here for the builders. The ones knee-deep in distributed systems, not whiteboard fantasies. If you want to get smarter about event sourcing and walk away with something you can actually use—this is your conference.
Speakers
Allard Buijze
CTO at AxonIQ
Allard is Founder and Chief Technology Officer at AxonIQ. He is a global thought-leader on event sourcing. He is a recognised expert with more than 20 years experience, including microservices, event sourcing and event-driven architecture. Allard advocates for better collaboration between developers and business.
- Keynote (October 1, 9:15 - 10:00)
Maarten-Jan van Gool
Craftsmen
Maarten-Jan is a software engineer at Craftsmen. He has extensive experience in developing JVM based (micro) services in both Java and Kotlin using frameworks like Spring. He specializes in designing and developing event driven and/or event sourced systems using the Axon Framework.
- How event sourcing can help you through timeline hell. A story from the Cadastre trenches (October 1, 10:15 - 11:00)
- Live coding: Slice by slice - combining event modeling, event sourcing and vertical slices (October 1, 10:15 - 11:00)
- From model to code - Combining event modeling & code generation with Axon (October 1, 13:00 - 15:00)
- Unlocking the power of low-code: event sourcing Mendix with Axon Framework (October 1, 11:15 - 12:00)
Simon Zambrovski
Holisticon
Simon is a senior consultant at Holisticon AG, Hamburg, Germany, and works as a BPM craftsman, event sourcerer, full-stack developer, trainer, and coach. His current interest is in distributed systems architecture, especially in the context of Domain-Driven Design, CQRS/ES, and multi-bounded context applications implemented in Java / Kotlin. In addition, he is a passionate open-source contributor to a dozen projects on GitHub.
- EMN - A semantic notation for event modelling (October 1, 11:15 - 12:00)
Christian Thiel
Holisticon
Christian is an Event Sourcing enthusiast and BPM Craftsman working as a Senior IT Consultant at Holisticon AG in Hamburg, Germany. He is interested in event-driven microservices, domain driven design, backend architectures and process digitalization via BPM. He is a big fan of open source and contributor to GitHub.
- EMN - A semantic notation for event modelling (October 1, 11:15 - 12:00)
Steven van Beelen
Axon Framework Lead Developer at AxonIQ
Steven has a keen interest in Axon Framework and how it approaches software architecture. He helps small and large clients build Axon applications, provides training, develops the framework and is active in the Axon community. Broader interests include domain driven design, messaging patterns and event sourcing.
- Axon Framework 5 (October 1, 15:15 - 17:15)
- AxonIQ latest (October 2, 10:15 - 11:00)
- Axon Framework 5 (October 2, 13:00 - 15:00)
- AxonIQ latest (October 2, 10:15 - 11:00)
Mitchell Herrijgers
Senior Solutions Engineer at AxonIQ
Mitchell is a software craftsman, passionate coder, and eager to learn. He likes complex challenges and he doesn't get discouraged easily. He is interested in the following topics; Kotlin/Java, Event-Sourcing / CQRS / Axon Framework, Cloud/AWS/Infrastructure as Code, and performance tuning. After his study, in Computer Science at the Rotterdam University of Applied Sciences, he worked as a software engineer at ING Bank, Codecentric, and the Port of Rotterdam
- AxonIQ latest (October 2, 10:15 - 11:00)
Andreas Grill
open200
- From Miro boards to living models: Building practical event models with a purpose-built tool (October 2, 10:15 - 11:00)
Ondřej Halata
ASSIST
Ondřej has a passion for building resilient infrastructure in the public cloud, utilizing cloud-native principles to ensure efficiency and reliability. His background is as a Linux Architect, where he spearheaded cloud migration projects and successfully migrated hundreds of servers. Now, he is a Lead DevOps Engineer overseeing their Axon Server cluster.
- Not on day 1 anymore – Day 2 engineering with Axon (October 2, 14:00 - 14:45)
Richard Bouška
ASSIST
Richard, who was a seasoned Java developer with a background in CORBA and distributed systems over 10 years ago, is now a solution architect with a strong dedication to CQRS design patterns. As the CTO of ASSIST, he supervises the application architecture for clients, focusing on creating robust and adaptable systems. His passion for strongly typed functional languages and asynchronous distributed systems drives his pursuit of excellence in delivering state-of-the-art solutions.
- Not on day 1 anymore – Day 2 engineering with Axon (October 2, 14:00 - 14:45)
Alex Wieland
open200
- From Miro boards to living models: Building practical event models with a purpose-built tool (October 2, 10:15 - 11:00)
Sebastian Voina-Winter
open200
- From Miro boards to living models: Building practical event models with a purpose-built tool (October 2, 10:15 - 11:00)
Rafael Espillaque
iManage
- Getting Axon production-ready at iManage (October 2, 11:15 - 12:00)
- An eventful solution for supporting healthcare professionals (October 2, 11:15 - 12:00)
Alson van der Meulen
- An eventful solution for supporting healthcare professionals (October 2, 11:15 - 12:00)
Vincent Canuel
IDCapture
- From Lagom to Axon: A real-world CQRS migration journey (October 2, 13:00 - 13:45)
