Modern applications often need to serve millions of users, support rapid feature iteration, and be resilient to failures. At the heart of meeting these needs is software architecture—the art and science of structuring systems for scalability, reliability, and maintainability. In this post, we’ll explore key principles for building scalable systems, architectural patterns, and best practices that empower systems to grow gracefully as demand increases. What is Scalability? Scalability is the ability of a system to handle a growing amount of work by adding resources. It is critical for platforms like social networks, e-commerce stores, and SaaS offerings, which must respond to su ...