Designing Modular Software with SRP and Hexagonal Architecture

When software grows, a single change in database logic or user interface can accidentally break core business rules. Combining the Single Responsibility Principle (SRP) with Hexagonal Architecture solves this by isolating your domain logic from external systems. This written course guides you through the foundational concepts of modern software design, helping you write code that is easy to test, adapt, and maintain over time. What you'll learn: - Understand the core concepts of the Single Responsibility Principle and why code should have only one reason to change. - Explore Hexagonal Architecture fundamentals, including the separation of domain logic, ports, and adapters. - Define clean application boundaries to isolate core business rules from external frameworks, databases, and APIs. - Apply modern dependency injection patterns to decouple components and improve system flexibility. - Design targeted unit tests by establishing clear boundaries around isolated, single-responsibility components. You will start with the fundamental definitions of clean architecture and SRP before moving on to step-by-step conceptual breakdowns of ports and adapters. Through clear written explanations and practical code scenarios, you will learn how to organize your codebase for maximum maintainability. This course is designed for software developers and programmers who want to transition from tangled codebases to structured, clean architectures. A basic understanding of object-oriented programming is recommended, but no prior experience with architectural patterns is required. Read this text-based guide to master clean code boundaries today.