DIY Event Sourcing Tooling Workshop

DIY Event Sourcing Tooling Workshop

Optimise the Developer Experience for CQRS and Event Sourcing architectures

Investments in tooling pay off quickly. Especially when you take small steps.
In this 2-day DIY Event Sourcing Tooling workshop with Marijn Huizendveld, we will look at different tools that can help us with building, testing, debugging and changing your software.

With examples taken from real projects, you will experience that specific tools can make you more efficient and how they would fit in your workflow.
Following each example we will implement the tool in the language of your choice.
If you bring your own event sourced domain models we discuss the constraints of your specific context.

The goal of this workshop is to inspire you to build tools that fit your context and to show you that it can be done with little effort.
After attending it you will be enabled to build tools yourself in the future.

Target audience

This course will be most beneficial for programmers. Are you a software tester who enjoys writing code and likes to be involved in the software construction process? You too might benefit from this course.

The workshop is centred around the web application context but the ideas are valuable in other types of applications too.

But regardless of your role, one thing is critical: you need a thorough knowledge of CQRS and Event Sourcing.


  • Seeing an overview of all the events of a specific stream in your web application by opening up the developer tools of your internet browser
  • An enriched view of the events in your event store that allows you to navigate to associated streams
  • Having links from your events to the commands that caused them in the view of your event store
  • A testing framework that can be understood by domain experts because it works based on domain events and commands
  • Downloading an integration test for your testing framework after reproducing a problem in a production environment
  • Your test scenarios visualized identical to your event storming workshop
  • Versioning of messages simplified thanks to a DSL for schema specification
  • Visualizing trends using your existing analytics toolset
  • This and more, applied in such a way that it becomes an integral part of your day to day workflow.

Expect to get your hands dirty

The goal of this two-day workshop with Marijn Huizendveld is to learn how to identify, design and build a tool for your specific context. What better way to learn than by doing: during the class, small teams will work on building their own set of tools.

The exercises will be centred around an existing domain model and corresponding event stream. Because each team will work on their own specific tool, we will be able to explore more ideas as a collective. At the end of the workshop, we will compare the various approaches.


In order to fully benefit from this workshop with Marijn Huizendveld, please make sure you have a:

  • Sufficient programming skills so that you can mob program within a team
  • Laptop with a “Hello world” application in a programming language that you’re proficient in
  • Some testing framework setup to run integration tests against your “Hello world” app.


Do I need my laptop?
Yes, you will need it. But keep in mind that although we are programming during the course we are not aiming to write production-level code. The goal is to learn about building our own tools.

Is there anything I need to do before the workshop?
Marijn will contact you for a 15-minute onboarding call prior to the training to get to know you and your context.

Will there be any materials to take away?
Some tools that are easily portable will be provided in the form of a code download.

What language will this workshop be in?
The workshop and all the materials will be in English.

Confirmation: Is the workshop guaranteed to run?
Yes, the worksop is confirmed. See you in Milan!

Practical Info

Language: English.
Time: 9.30 am – 5.30 pm
Laptop: Check out the FAQ section. 
Included in the price: Two coffee breaks and lunch with the trainer and the other attendees are also included in this ticket… because networking matters :-)

How to get to Milan?

The workshop will be held at the Pirelli Institute (Viale Fulvio Testi, 223, Milan).
Check out how to get to the Pirelli Institute, our recommendations for the accommodation, how to get to Milan, and much more at our Pirelli Institute Venue Page.

Questions? Drop us a line at [email protected].


Metadata is cool, use them on your message and create tools to manage it “like a breeze”.Gianluca Padovani – Software Developer and CTO

Marijn Huizendveld

Marijn works as an independent software consultant for (corporate) startups and scale-ups within Europe. He studied business school (boring though useful) and moonlighted as a freelance software engineer (limited impact, lots of fun).


Check out the video interview Alberto Brandolini did with Marijn Huizendveld on Avanscoperta’s YouTube channel.

About us

Avanscoperta is a growing community of professionals learning together, exchanging experiences and ideas, exploring uncharted territories.

We carefully select the most relevant topics and the best trainers and thought leaders worldwide with an eye to the most engaging teaching techniques.
Are you ready to learn with us? ?

Are you interested in this course?

If you have any specific questions, or if you want to receive more information on dates, content or offers about this course, drop us a line. We'll gladly get back to you!


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