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Henning Schwentner @hschwentner.bsky.social · 09/12/2025

- Only then get out the legacy system and see where its current architecture aligns with the target architecture and where changes have to be made.

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Henning Schwentner @hschwentner.bsky.social · 09/12/2025

- From this domain knowledge you will be able to derive the target architecture.

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Henning Schwentner @hschwentner.bsky.social · 09/12/2025

- So, the first step is to (re-)understand the domain, i.e. the business and its processes.

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Henning Schwentner @hschwentner.bsky.social · 09/12/2025

The best way to split a monolith is to first put that monolith aside. It might be counterintuitive, but before you decompose the legacy system, it is important to understand what the problem is that the system was built for. domain-driven-transformation.com

domain-driven-transformation.com

Domain-Driven Transformation

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

- And last but not least to our families. You are the best; this wouldn't have been possible without you!

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

- To Sergio Morazán, @suksr.bsky.social, Philipp Kostyra, @tekiegirl.bsky.social, @gienverschatse.com, and Joe Yoder for their terrific endorsements - To Michele Cronin and Louise Corrigan, our editors at @oreilly.bsky.social

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

- To James Higginbotham, Stefan Hofer, @vladikk.bsky.social, Mufrid Krilic, Sönke Magnussen, @bitboss.bsky.social, @nick-tune.me, @vaughnvernon.bsky.social, Rebecca Wirfs-Brock, and Eoin Woods for their reviews that improved the text so much

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

This is the moment to say thank you: - To Michael Feathers for an amazing foreword - To @ziobrando.bsky.social and Jörn Koch for their contributions to the Collaborative Modeling chapter

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

Our goal with this book is to be helpful when you have to deal with what is called a Monolith or Big Ball of Mud. We describe how to combine Domain-Driven Design, Team Topologies, Modularity Maturity Index, EventStorming, Domain Storytelling and other tools to refactor legacy software.

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Henning Schwentner @hschwentner.bsky.social · 05/12/2025

It has been quite an odyssey, but now it is finally here: 📣 📚 Domain-Driven Transformation: Modernize Legacy Systems and Mitigate Risk 📚 📣 In this book, Carola Lilienthal and I present our approach to transform architecturally eroded systems. domain-driven-transformation.com

Cover of the bool Domain-Driven Tranformation featuring an Atlas Moth

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Henning Schwentner @hschwentner.bsky.social · 14/03/2025

Servus Vienna! I’m happy to announce that I’m going to speak at the Softwarearchitektur Wien meetup on March 26. If you want to learn about “Modern Software Architecture with the Architecture Hamburger” please join: www.meetup.com/softwarearch... @stefantoth.bsky.social #softwarearchitecture #🍔

meetup.com

Modern Software Architecture with the Architecture Hamburger, Wed, Mar 26, 2025, 5:30 PM | Meetup

Hello everyone, We have an exciting meetup coming up for you! Henning Schwentner from WPS, also one of the co-organizers of ComoCamp, is going to join us to talk about Mod

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Virtual Domain-Driven Design @virtualddd.com · 09/11/2024

Moin Hamburg! On the 21st of November there will be a local DDD meetup on Domain-Driven Transformation with @hschwentner.bsky.social. He will present a catalog of refactorings that help cure: BBOM architecture, anemic domain models, and badly organized teams. RSVP here:

buff.ly

Global DDD Day in Hamburg: Domain-Driven Transformation (Henning Schwentner), Do., 21. Nov. 2024, 18:00 | Meetup

**💥Special Edition celebrating the [Global Domain-Driven Day 2024](https://virtualddd.com/open-space/global-domain-driven-days-2024/)💥** **📜Timetable📜** * 18:00h Welc

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Henning Schwentner @hschwentner.bsky.social · 05/11/2024

Thanks Sönke! Glad that the book helps. Carola and I are currently working with @vaughnvernon.bsky.social on the English edition.

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Diana Montalion @dianamontalion.com · 29/02/2024

The organizers have created an inspiring and fun space to explore systems design here in the US. I've missed gathering here and can't wait to get to Denver on March 12th. Check out the schedule and pre-conference offerings. exploreddd.com

exploreddd.com

Explore DDD Conference - 2024

Explore DDD Conference - 2024: Domain-Driven Design Conference in Denver, Colorado, USA for Software Leaders. Practical, cutting-edge, talks & workshops.

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Henning Schwentner @hschwentner.bsky.social · 05/02/2024

On February 14, DDD Hamburg Meetup welcomes @carolali speaking about “Fighting Technical Debt with DDD.” Thanks, Kai Rüstmann and Falco Wehber from SIGNAL IDUNA for hosting! #dddhamburg #dddesing #softwarearchitecture www.meetup.com/de-DE/ddd-hh...

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ComoCamp @comocamp.bsky.social · 26/01/2024

ComoCamp is back! We just opened our ticket shop. Join us in Vienna, May 6–8 2024! Register at comocamp.org 🎉🥳🎫

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Henning Schwentner @hschwentner.bsky.social · 14/11/2023

Happy to restart #DDDHamburg with “Introduction to DDD—It’s All About the Domain, Honey” on Dec 6! We look on the foundations of Domain-Driven Design, but it’s also a gathering of the community. Plus: pizza and Glühwein 🍕🎅🏼🍷 Repost appreciated :-) #DDDesign www.meetup.com/ddd-hh-domai...

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Markus Geiger @markusg.eurosky.social · 17/11/2023

Coffee with a view 🥰 Gleich geht's los mit der WPS software@work-Konferenz #sawconf

Kaffee-Buffet, im Hintergrund die Elbphilharmonie

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Mike Sperber @sperbsen.bsky.social · 17/11/2023

Video from the talk @hschwentner.bsky.social and I gave at #DDDeu on FP vs. DDD is up. Loving the comment section already! www.youtube.com/watch?v=3nkw...

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Henning Schwentner @hschwentner.bsky.social · 16/11/2023

When @hofstef and I wrote “Domain Storytelling,” we worked hard to push out all the errata. Inevitably, some still slipped through and we collect them at domainstorytelling.org/book If you find more, help us and create a pull request on the website! #DomainStorytelling #DDDesign

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Henning Schwentner @hschwentner.bsky.social · 14/11/2023

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Henning Schwentner @hschwentner.bsky.social · 09/11/2023

As a first activity, I’m planning the next session on December 6 as a real life meeting with a talk and some glühwein. As a restart after the years of the pandemic the talk will be an introduction to DDD. Details will follow soon. It would be terrific to see you there! 4/4

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Henning Schwentner @hschwentner.bsky.social · 09/11/2023

Thanks also to Virgilio Lino for kicking off the meetup back in 2016, and to Hauke Stange for supporting as co-organizer. 3/4

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Henning Schwentner @hschwentner.bsky.social · 09/11/2023

In the last couple of years Ulrich Schmidt-Goertz served as the organizer of the meetup DDD Hamburg and has hosted many awesome sessions with both local and international speakers like Jimmy Nilsson, @mathiasverraes.bsky.social, and Martin Schimak. Thanks a lot for the great work! 2/4

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Richard Seidl - Future Optimist - People & Tech Enthusiast @richard-seidl.com · 08/11/2023

Heute spreche ich mit @hschwentner.bsky.social über Domain Storytelling. Er ist Experte für diese Methode, kürzlich ist sein gleichnamiges Buch auf deutsch erschienen. Was Domain Storytelling ist, wann und wie es angewendet wird und wo die Grenzen sind erzählt er uns 🎧 swt.fm/6j50

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Henning Schwentner @hschwentner.bsky.social · 08/11/2023

Social media damage my mental health. Nonetheless I couldn’t resist to open a Bluesky account any longer. So: hello world!🙋🏻‍♂️🟦 #introduction

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