Software is everywhere—powering businesses, connecting people, and automating our lives. But what happens when a small app suddenly gains millions of users? Can your system handle it, or will it crumble under the weight? Enter scalable software architecture: the art and engineering of designing systems that gracefully grow with demand. What is Scalability? At its core, scalability is a system's ability to handle increased load without sacrificing performance, stability, or availability. Whether you're dealing with more users, requests, or massive data, scalability measures how well your architecture adapts. Types of Scalability Vertical Scaling (Scaling Up): Adding ...