DDD, necessary but insufficient: physical design principles for microservices

Helping organizations accelerate software delivery

I provide consulting and training services that help organizations improve their architecture and accelerate software delivery.


I can, for example, review your microservice architecture and identify areas of improvement, or teach a workshop on how to design a microservice architecture.


I also can teach a 1 day workshop Microservices rules: what good looks like that can help you decide whether microservices are a good fit for your application.

South Korea, Singapore, Thailand and India

In April and May, I'll be making trips to Asia. If you are interested in a workshop or consulting engagement at your company, please don't hesitate to contact me.


I'll also be available for remote engagements in those timezones.

ExploreDDD 2024 - DDD, necessary but insufficient: physical design principles for microservices

When we design software using DDD, we primarily focus on creating models scoped by bounded contexts that define ubiquitous languages. We also structure the models and the elements they contain to be loosely coupled and highly cohesive. However, while (logical) design techniques such as DDD domain modeling concepts, loose coupling and high cohesion are essential for creating good software, they are insufficient when designing a microservice architecture. In particular, we must also consider other more physical constraints including team size; team, process and transaction boundaries; and the cost of communication over a network.


In this talk, I describe a set of physical design principles for organizing subdomains into microservices. You will learn about both principles that encourage finer-grained decomposition into services as well as those that discourage decomposition. I describe how to apply those principles to design a microservice architecture.


To learn more please take a look at the slides and video.

Discounts for my microservices data patterns bootcamp


Now is a good time to enroll your team in my distributed data patterns bootcamp.


It covers the key distributed data management patterns including Saga, API Composition, and CQRS.


The bootcamp consists of video lectures, quizzes and code walk-throughs/labs. It's self-paced and you can start at any time. There is a weekly ask-me-anything video conference repeated in multiple timezones.


Use the coupon ILFJODYS to sign up for $95 ($300 discount!!). There are bigger discounts for buying multiple seats (10+ and 20+). Bulk purchases come with the option of private, paid Q&A sessions. Valid until April 12th, 2024


Learn more and enroll

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Microservice architecture workshop at ExploreDDD, Denver

Wednesday, February 21, 2024

Discount for microservices bootcamp ends on March 12th Microservice architecture workshop at ExploreDDD, Denver In March, I'll be teaching a two day microservices workshop at the most excellent

Reminder: Microservices workshop at JFokus and clarifying architecture with service blueprints

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Discount for microservices bootcamp ends on January 12th Microservice architecture workshop at JFokus, Stockholm Stockholm, which is one of my favorite cities, was one of the last places I visited

Microservices workshop at JFokus and clarifying architecture with service blueprints

Tuesday, January 9, 2024

Discount for microservices bootcamp ends on January 12th Microservice architecture workshop at JFokus, Stockholm Stockholm, which is one of my favorite cities, was one of the last places I visited

Learning about the microservice architecture

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Visiting Seoul, Melbourne, Sweden, London and Denver Chris in Seoul, Melbourne, Sweden, London and Denver In the near future, I'll be in Seoul, Melbourne, Sweden, London and Denver I'm

Reminder: Service blueprints: creating a shared understanding of your architecture

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