Java Memory Model Demystified: Key Concepts and Usage

TLDR: Java memory is split into two main areas: the Stack (for method execution) and the Heap (for objects). The Heap is further divided into Young Generation (Eden, Survivor) and Old Generation to optimize Garbage Collection. Understanding this stru...

Exploring the Strategy Design Pattern: Simplifying Software Design

TLDR: If your code is full of if (type == A) doThis() else if (type == B) doThat(), you need the Strategy Pattern. It allows you to define a family of algorithms, encapsulate each one, and make them interchangeable at runtime. What is the Strategy ...

Low-Level Design Guide for Ride Booking Application

TLDR: Designing Uber isn't just about maps; it's about managing state. A ride goes from REQUESTED to ACCEPTED to COMPLETED. We use the Strategy Pattern for pricing (Surge vs. Standard) and the Observer Pattern to notify drivers. This guide walks thro...

Webhooks Explained: Don't Call Us, We'll Call You

TLDR: Polling is like asking "Are we there yet?" every 5 seconds. Webhooks are like the driver tapping you on the shoulder when you arrive. They allow systems to communicate in real-time by sending HTTP POST requests when an event occurs, saving reso...

API Gateway vs Load Balancer vs Reverse Proxy: What's the Difference?

TLDR: These three terms are often used interchangeably because they overlap. A Reverse Proxy hides the server. A Load Balancer distributes traffic. An API Gateway manages APIs (Auth, Rate Limiting). Think of them as a hierarchy: An API Gateway is a L...