software design

System design is the process of planning how different parts of a software system work together to handle users, data, traffic, and business requirements efficiently. It involves making decisions about architecture, databases, APIs, caching, authentication, scalability, reliability, and communication between services. A good system design does not only focus on making an application work, but also ensures that it can remain fast, secure, maintainable, and reliable as the number of users grows. In simple terms, system design is like creating the blueprint of a large application before building it, deciding where each component belongs and how everything communicates.