Scalability is at the heart of modern software systems. Whether you’re working on a SaaS product, a cloud-native application, or a high-volume ecommerce platform, designing systems that can gracefully handle growth is critical. In this post, we’ll explore the essence of scalable software architecture, foundational principles, and proven patterns to guide your journey. What is Scalability? Scalability refers to the capacity of a system to handle increased load, traffic, or data by adding resources—usually with minimal changes to the system’s core architecture. A scalable system is not just one that works well when launched, but one that can grow alongside its users and busines ...