Design Patterns – Writing Clean and Maintainable Software

This course provides a comprehensive and practical understanding of Design Patterns used in modern software engineering. It is ideal for developers who want to improve code quality, architecture skills, and problem-solving capability while working on real-world projects.

Last updated: February 21, 2026

What is the Design Patterns Course About?

A hands-on deep dive into classic GoF Design Patterns and modern architectural patterns, focusing on when and how to use them effectively in real applications.

Objectives of the Design Patterns Course

Understand problem-solution mapping, improve architectural thinking, write reusable and testable code, and build robust enterprise-grade applications.

Who is this Course For?

Java Developers, Backend Engineers, Full-Stack Developers, and Students preparing for professional development and technical interviews.

Prerequisites

Good understanding of Core Java and OOP concepts is recommended.

Training Modes

Online

Live virtual interactive training with examples and coding workshops.

In-person

Instructor-led classroom training with guided hands-on learning.

Course Outline

Training Level: INTERMEDIATE

Introduction to Design Patterns

Understand why design patterns are needed and how they evolved.

What are Design Patterns?

Benefits of Using Patterns

GoF Categories Overview

Pattern Selection Guidelines

Object-Oriented Principles

Strengthen the foundation before applying patterns.

SOLID Principles

Coupling and Cohesion

Composition vs Inheritance

Code Smells and Refactoring

Creational Patterns

Learn patterns that deal with object creation.

Singleton

Factory Method

Abstract Factory

Builder and Prototype

Structural Patterns

Understand patterns that deal with class and object composition.

Adapter

Decorator

Composite

Facade and Proxy

Behavioral Patterns

Implement communication and responsibility management among objects.

Strategy

Observer

Template Method

Command and State

Enterprise and Architectural Patterns

Explore real-world enterprise-level design concepts.

MVC and MVVM

Repository Pattern

Service Layer Pattern

Dependency Injection Pattern

Anti-Patterns and Pitfalls

Understand misuses of patterns and avoid common mistakes.

Over-Engineering

Pattern Addiction

When NOT to Use a Pattern

Real-World Failure Examples

Hands-On Implementation Workshop

Apply patterns in real development scenarios.

Refactoring Legacy Code

Designing a Feature with Patterns

Performance & Maintainability Considerations

Review and Discussion

Best Practices & Interview Preparation

Learn how to communicate design solutions effectively.

How to Justify Pattern Selection

Common Interview Questions

Design Case Studies

Practical Coding Scenarios

Mini Project – Real Design Patterns Application

Build a working project integrating multiple patterns together.

Problem Understanding

Architecture Design

Implementation

Testing & Review