Domain-Driven Design and Clean Architecture

Domain-driven design (DDD) is a software strategy for tackling large, complex business systems by organizing code around the domain's language, rules, and boundaries. In Rust, DDD becomes particularly powerful because the type system can enforce domain constraints at compile time and eliminate entire categories of bugs before runtime. This series teaches you how to apply DDD principles to Rust projects, using the type system as a first-class citizen of your domain modeling strategy.

You'll learn to model domains with types, define clear architectural boundaries using hexagonal architecture (ports and adapters), and structure your code so that business logic is isolated, testable, and independent of frameworks or persistence mechanisms. Whether you're building a backend service, a command-line tool, or an embedded system, these patterns scale from small utilities to large multi-team codebases.

By the end of this series, you'll understand how to use Rust's traits as ports, write adapters that plug into those ports, and organize your code so that your business domain is front and center—not buried under web framework boilerplate or database coupling. This approach makes code easier to test, easier to understand, and easier to evolve as business requirements change.

Articles in this series

• Domain-Driven Design Explained: Core Concepts for Rust Developers
• Modeling Business Domains with Rust's Type System
• Value Objects and Entity Pattern: Immutable Domain Concepts
• Aggregates and Boundaries: Coordinating Domain Changes
• Hexagonal Architecture Basics: Ports and Adapters in Rust
• Implementing Ports as Traits: Defining Abstract Boundaries
• Adapter Pattern in Rust: Concrete Implementations and Coupling
• Anti-Corruption Layer: Isolating Domain from External Systems
• Testing Domain Logic: Unit, Integration, and End-to-End Strategies
• Building a Complete DDD Service: Real-World Capstone Example