Free online courseExpress JS Full Tutorial

Course Description

If you want to move from basic Node.js scripts to real-world backend development, Express.js is one of the fastest ways to get there. This free online course helps you turn ideas into working APIs by teaching you how to handle requests cleanly, shape predictable responses, and build server-side features that are used in professional applications every day. You will understand not only what to write, but why it works and how to structure an app so it stays maintainable as it grows.

Throughout the lessons, you will gain confidence with the essentials of building an HTTP API: defining routes, capturing dynamic values from the URL, reading query strings, and working with the request body for POST, PUT, PATCH, and DELETE operations. Just as importantly, you will learn the practical behavior expected from a well-built API, including how to handle invalid inputs, how to avoid requests hanging indefinitely, and how to return useful error responses that clients can act on.

As you progress, the course connects core Express concepts to the features users expect from modern products. You will work with middleware to control the flow of a request, validate incoming data to keep your API trustworthy, and organize code with routers so a growing codebase stays clear. You will also learn how to use cookies and sessions to maintain state between requests, then take the next step into authentication workflows, including local username/password logins and OAuth2 patterns commonly used for third-party sign-in.

To round out your backend skill set, the course introduces database integration using MongoDB and Mongoose, including practical data modeling concerns like unique constraints, plus secure password hashing with bcrypt so you can store credentials responsibly. Finally, you will see how to add automated testing with Jest and write higher-confidence end-to-end API tests with SuperTest, helping you ship changes without breaking existing behavior. By the end, you will be equipped to build, secure, and test a complete Express-based backend that feels close to what teams run in production.