Backend Development in AI Era: Part 1

Backend development is much more than writing APIs or connecting a database. It's the engine that powers every application, handling data, business logic, security, communication, and scalability. In this course, you won't just learn how to build a backend—you'll learn what a backend is, why it exists, and how all its pieces work together. We'll explore the core components of a backend system, including servers, databases, APIs, business logic, authentication and authorization, sessions, tokens, caching, messaging, file storage, and background jobs. You'll understand how requests travel from a client to a server, how data is processed, and how responses are generated. You'll also learn the purpose of backend frameworks, when to use them, and the problems they solve, rather than simply following framework-specific tutorials. We'll cover essential security concepts such as authentication, authorization, encryption, input validation, common web vulnerabilities, and strategies for building secure applications.