Virtual Domain-driven design

About Virtual Domain-driven design

If you don't live near an active Domain Driven Design meetup, or just want to get more in-depth knowledge of DDD, please join this vast growing community! Anyone is invited here. We strive to create a community of like-minded people eager to dive more into Domain Driven Design. We are going to organise panel discussions, community talks and more. So feel free to join us!

Publisher

Virtual Domain-driven design

Category

news · science · technology

Language

en

Explicit

No

First episode

26 Aug 2019

Latest episode

6 Aug 2026

Latest episodes

62 episodes in the feed.

1. 

   6 Aug 2026

   Surviving a National Blackout with Offline-First Architecture | Emilio Carrión

   We design for high availability assuming connectivity is always present. But what happens when a nationwide power outage leaves warehouses in the dark and cloud systems completely unreachable? During a major blackout that impacted most of Spain’s power grid, Mercadona Online had thousands of active orders mid-fulfillment across warehouses. While central systems went down, logistics operations had to continue. In this session, Emilio breaks down the architectural decisions — and the business trade-offs behind them — that made system survival possible: Local-first as a first-class citizen: how edge nodes operated in “bunker mode” with on-site compute, keeping warehouse operations running without central systems. The split-brain dilemma: managing state divergence between physical reality and the central database, and the rules that determined which side wins. The resurrection problem: reconciling millions of offline transactions once connectivity was restored, including race conditions and data recovery challenges. Every decision in this architecture was driven by real business constraints: SLAs with physical warehouses, perishable goods with expiration times, and logistics costs measured in thousands per minute of downtime. This is not a theoretical chaos engineering talk — it is a real-world case study of how architectural trade-offs made years earlier kept a critical business running when everything else failed.

2. 

   29 Jan 2026

   Critically Engaging with Models a conversation with Rebecca

   In this session, we are joined by Rebecca Wirfs-Brock, who will first present a short talk on their essay Critically Engaging With Models (https://verraes.net/2022/09/critically-engaging-with-models/) followed by a group discussion. It would be great if you could read their essay beforehand. If you want to support their writing and read more, you can buy their book, Design and Reality: Essays on Software Design (https://leanpub.com/design-and-reality) Models, whether for a software system, a development process, diseases, political systems, or otherwise, are a way to look at (a part of) the world. They make a choice about what is important, what categories we classify things in, what we see, what’s invisible, what’s valued, or even what’s valid. They are reductionist, that is, they only show a selection of the subject they’re describing. And they are biased: They implicitly reflect the assumptions, constraints, and values of the model’s author. Most of the time, when you adopt a model created by someone else, you assimilate it into your world view without much thought. You acquire a new way of seeing something. But when you do that, you may not understand the model’s limitations. However, you can choose to look at someone’s model more intentionally. We will share and discuss some tools for critically evaluating any models that come your way. You can assess whether this model fits your needs. If you’re looking at a model for the first time, you can use that fresh perspective to see what the model includes and what it leaves out. Models are a powerful lens for perceiving a subject, and you should be deliberate when wielding them.

3. 

   26 Nov 2025

   Patterns of BDD Automation - a Fireside chat with Seb Rose and Gáspár Nagy

   Automation is a frequently discussed topic in the development and test communities - and has been for many years. Similarly, patterns have been part of community discourse ever since the Design Patterns book was published in 1994. It appears to us that both suffer from periodic bursts of hype and long stretches of neglect. While working on the Automation Patterns portion of our new book Effective Behavior-Driven Development, we have had the chance to explore the nuances of context specific automation and pattern forms. Our knowledge of BDD-specific automation styles comes from many years of practical application in industry. However, our experience with patterns has, up until this point, been mainly one of consumption. That changed when we took a subset of our BDD automation patterns to this year’s EuroPLoP pattern workshops — and got a refreshed view of pattern authoring. We’re happy to share the insights gained and challenges remaining in a conversation with VirtualDDD. About the speakers Seb has been a consultant, coach, designer, author and developer for over 40 years. He has been involved in the full development lifecycle with experience that ranges from architecture to support, from C to Visual Basic. During his career, he has worked for companies large (e.g. IBM, Amazon) and small, and has extensive experience of failed projects. He's now an independent software consultant and author, promoting effective ways of working to the software development and testing community. Regular speaker at conferences and occasional contributor to software journals. Co-author of "Effective Behaviour Driven Development" (Manning), lead author of “The Cucumber for Java Book” (Pragmatic Programmers), and contributing author to “97 Things Every Programmer Should Know” (O’Reilly). He blogs at claysnow.co.uk (http://claysnow.co.uk/) and socialises as sebrose@mastodon.scot Gáspár Nagy, the creator of SpecFlow & Reqnroll, bringing over 20 years of experience as a coach, trainer and test automation expert nowadays through his company, called Spec Solutions. He is the co-author of the books "Discovery: Explore behaviour using examples", "Formulation: Document examples with Given/When/Then" and "Effective Behavior-Driven Development" and also leads SpecSync, aiding teams in test traceability with Azure DevOps and Jira. He is active in the open-source community through leading the Reqnroll project. Gáspár shares his insights at conferences, emphasizing his commitment to helping teams implement Behavior-Driven Development (BDD).

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