Domain-Driven Design (DDD) is an important strategic approach to software development. It involves deeply understanding and modeling a business domain, particularly beneficial in complex domains with intricate business rules, processes, and interactions. However, effectively implementing DDD requires discipline, a strong grasp of the domain, and the avoidance of common pitfalls that can lead to suboptimal designs and technical debt. In this article, we’ll explore 10 things to avoid in DDD and examples to illustrate these pitfalls.

1. Focusing Too Much on Technical Patterns

Sample Scenario

A team begins a project by excessively creating repositories, aggregates, and value objects without fully grasping the business domain. For example, they develop a complicated repository for managing Customer entities without understanding how customers are represented and utilized within the business. Consequently, the repository contains numerous unnecessary methods that do not align with the domain’s actual use cases and requirements.