SOLID Principles: Introducing Software Architecture & Design Course Syllabus

Overview: This course introduces developers to the foundational SOLID principles of object-oriented design, guiding you from basic concepts to real-world application. Through clear explanations and hands-on coding exercises, you'll learn how to build clean, maintainable, and scalable software systems. The course is structured into six focused modules, totaling approximately 6 hours of content, with practical demos and a final project to solidify your understanding. Lifetime access ensures you can learn at your own pace and revisit concepts as needed.

Module 1: Introduction to SOLID Principles

Estimated time: 0.5 hours

• Importance of software architecture
• Benefits of clean code
• Evolution from procedural to object-oriented design
• Context setting through analysis of a poorly designed system

Module 2: Single Responsibility Principle (SRP)

Estimated time: 1 hour

• The idea of one class, one job
• Breaking up responsibilities
• Identifying real-world code smells
• Refactoring monolithic classes into cohesive units

Module 3: Open/Closed Principle (OCP)

Estimated time: 1 hour

• Extending functionality without modification
• Using abstract classes and interfaces
• Designing for plug-and-play extensibility
• Implementing OCP in a payment gateway use case

Module 4: Liskov Substitution Principle (LSP)

Estimated time: 0.75 hours

• Ensuring safe substitution of subclasses
• Understanding behavior contracts
• Avoiding misuse of inheritance
• Fixing broken hierarchies using LSP

Module 5: Interface Segregation Principle (ISP)

Estimated time: 0.67 hours

• Designing many small, focused interfaces
• Avoiding 'fat' interfaces
• Creating flexible service contracts
• Designing cleaner APIs for clients using ISP

Module 6: Dependency Inversion Principle (DIP)

Estimated time: 1 hour

• Decoupling high-level and low-level modules
• Using abstractions to invert control
• Implementing dependency injection
• Applying DIP in a notification system

Module 7: Final Architecture & Case Study

Estimated time: 1 hour

• Review of all five SOLID principles
• Integrating principles in an end-to-end system
• Building a mini project demonstrating SOLID in practice

Prerequisites

• Familiarity with object-oriented programming concepts
• Basic knowledge of a programming language (preferably C#, Java, or similar)
• Understanding of classes, methods, and interfaces

What You'll Be Able to Do After

• Apply SOLID principles to write clean, maintainable code
• Refactor legacy systems to improve design and scalability
• Think architecturally when solving software problems
• Design flexible and extensible object-oriented systems
• Build robust applications using proven design practices