1. The Complete Guide to Design Pattern Categories

Ever wonder which design pattern to use for your codebase? 🤔 In this quick Short, we break down the three main categories of design patterns defined by the "Gang of Four": Creational, Structural, and Behavioral. 🔹 Creational Patterns: Focus on flexible object creation, like using a Factory Pattern to dynamically create different mobile phone models (like MiUltra) without breaking existing code. 🔹 Structural Patterns: Deal with class and object composition, like using a Decorator Pattern to dynamically add premium features to an EdTech membership system. 🔹 Behavioral Patterns: Manage object interactions and responsibilities, like using a Strategy Pattern to easily swap out payment methods (Credit Card, PayPal, Bitcoin) at checkout. Read my full deep-dive blog post with real-world backend examples, production metrics, and interview tips here: https://piyushanandmittal.blogspot.com/2026/03/understanding-design-patterns.html