Software Engineering Fundamentals
Core software engineering principles every developer should master — SOLID, clean code, and refactoring.
Understanding SOLID Principles in Object-Oriented Design
A complete introduction to the five SOLID principles with Java examples and Spring Boot context — the foundation of clean object-oriented code.
Single Responsibility Principle (SRP) Explained with Java Examples
Master the Single Responsibility Principle with Java and Spring Boot examples — why classes with one reason to change are easier to test and evolve.
Open/Closed Principle (OCP) in Real-World Spring Boot Applications
Use the Open/Closed Principle to extend behavior without rewriting tested code — practical Spring Boot examples with polymorphism and strategies.
Liskov Substitution Principle (LSP) Explained Simply
Understand the Liskov Substitution Principle with Java examples — when inheritance breaks and how to design correct subtypes.
Interface Segregation Principle (ISP) with Practical Examples
Why fat interfaces hurt your code — use the Interface Segregation Principle to design clean, role-based contracts in Java.
Dependency Inversion Principle (DIP) in Spring Boot
Apply the Dependency Inversion Principle in Spring Boot — depend on abstractions, swap implementations, and write tests without mocking frameworks.
Refactoring Bad Code Using SOLID Principles
A step-by-step refactoring walkthrough that turns a tangled Java service into clean, testable code by applying each SOLID principle.