Let’s Bridge the Gap Between DDD Theory and Implementation

If you’ve ever felt that Domain-Driven Design (DDD) is full of beautiful concepts that are surprisingly hard to translate into actual C# code, you’re not alone. We’ve all been there—reading about Aggregates and Bounded Contexts, only to wonder how to structure the project the next morning.

I wrote "From Problems to Patterns — Domain-Driven Design and Event Sourcing in .NET" to provide the practical, hands-on path I wished I had when starting out.

A Different Way to Learn Architecture

Instead of teaching patterns in isolation, this book follows a "problem-first" approach. We start with a straightforward CRUD implementation—the kind we’re all familiar with—and intentionally watch it struggle under real-world requirements.

Across 32 chapters, we evolve that system together. We only introduce a new pattern when the current approach hits a wall. This way, you don't just learn how a pattern works; you gain a deep professional intuition for why it’s the right tool for the job.

What We’ll Cover Together:

• Strategic DDD: Moving beyond buzzwords to master Ubiquitous Language and Bounded Contexts in practice.
• Event Sourcing, Demystified: We’ll build a robust command log by hand first, so you understand the "magic" before we switch to a framework.
• Modern .NET 9 Stack: Clean, professional code using C# 13 and the latest .NET 9 features.
• Production-Grade Infrastructure: Implementing Polly for resilience, OpenTelemetry for observability, and Docker for deployment.
• Test-Driven Evolution: Over 150 tests across the journey to ensure everything stays solid as we refactor.

One Domain, 32 Chapters of Growth

To keep things grounded, we stay with a single Bank Account domain throughout the entire book. You’ll see a single codebase grow from a simple prototype into a distributed, observable, and event-sourced system built on SourceFlow.Net.

Explore the Code

The complete, runnable companion code is open-sourced on GitHub. Feel free to dive in and see the patterns in action:
👉 GitHub Repository

Pick Up the Book

If you're ready to take your .NET architecture skills to the next level, you can find the book on Amazon:
👉 Available on Amazon

I’m really curious to hear about your experience with DDD. What was the "lightbulb moment" for you, or which part of the implementation still feels the most challenging? Let’s chat in the comments!