Henning Schwentner

domain-driven-transformation.comDomain-Driven Transformation

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

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

- 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.

domain-driven-transformation.comDomain-Driven Transformation

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

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

- 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

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

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

- 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

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.

meetup.comModern Software Architecture with the Architecture Hamburger, Wed, Mar 26, 2025, 5:30 PM | MeetupHello 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

14 Mar 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.comDomain-Driven Transformation with Henning Schwentner, Mo., 3. Feb. 2025, 18:30 | MeetupWe will meet at 6:30pm at TESTIFI GmbH for drinks and pizza. The talk starts at 7:00pm and will be in English. **Henning Schwentner: Domain-Driven Transformation — How to B

27 Jan 2025

Looking forward to be speaking at Microservices Meetup Munich next week. Join if you like to learn about Domain-Driven Transformation. www.meetup.com/de-DE/micros... #dddesign #microservices #softwarearchitecture #legacycode

Henning Schwentner reposted

Virtual Domain-Driven Design

@virtualddd.com

9 Nov 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.lyGlobal 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

meetup.comGlobal 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

8 Nov 2024

📣New DDD Hamburg Meetup📣 On Nov 21 we’re celebrating the Global Domain-Driven Day 2024 (lnkd.in/gNxhxHdb) with a session on Domain-Driven Transformation. @kenny.weave-it.org @heimeshoff.bsky.social @mentrix.bsky.social @maxsc.bsky.social for the initiative! www.meetup.com/de-DE/ddd-hh...

comocamp.orgComoCamp 2024The ComoCamp is the unconference reaching out to bring practitioners of collaborative modeling methods together with their creators and thought leaders.

1 Mar 2024

With a couple of friends from the community, I’m organizing the ComoCamp—an unconference that brings together the makers and masters of collaborative modeling methods like #EventStorming, #UserStoryMapping, and #DomainStorytelling. @selketjah.bsky.social @ewolff.com comocamp.org

Henning Schwentner reposted

Diana Montalion

@dianamontalion.com

29 Feb 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. https://exploreddd.com/

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

5 Feb 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...

Henning Schwentner reposted

ComoCamp

@comocamp.bsky.social

26 Jan 2024

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

Henning Schwentner reposted

14 Nov 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...

Henning Schwentner reposted

Mike Sperber

@sperbsen.bsky.social

17 Nov 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...

16 Nov 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

14 Nov 2023

ddd.hamburgDDD-HH Domain-driven Design Hamburg | MeetupWe're a group of Domain Explorers, not just developers, interested on real cross functional discovery adventures. Some of us are already trying DDD, others just love it and would like to spread it. We...

I’m thrilled to take over the job of organizing the #DDDHamburg meetup from Ulrich Schmidt-Goertz #DDDesign ddd.hamburg 1/4

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

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

I’m thrilled to take over the job of organizing the #DDDHamburg meetup from Ulrich Schmidt-Goertz #DDDesign ddd.hamburg 1/4

Richard Seidl - Future Optimist - People & Tech Enthusiast

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

Henning Schwentner reposted

@richard-seidl.com

8 Nov 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