Learn Node.js: Backend & API

Node.js clicks the moment you understand the event loop. Once you see how a single thread handles thousands of requests, callbacks, promises and streams stop feeling like magic. This app helps you learn Node.js that way, explaining how things work and then letting you build real backend projects.

A Complete Node.js Course

Chapters move from the basics and architecture to V8, libuv, modules, the event loop, streams, HTTP servers and security, each with clear explanations, code examples and key points.

Express JS and REST APIs

Learn routing, middleware, route parameters and response methods in Express JS, then apply them to REST APIs that talk to MongoDB and MySQL.

Build Seven Real Projects

Each project is built step by step: a todo REST API, user auth with JWT, REST APIs with MySQL and MongoDB, a Socket.IO chat server, a file upload API and a rate limiter.

1,100 Interview Questions

Quizzes at basic, medium and advanced level cover the event loop, async code, Express, MongoDB, authentication, security and more, each with an explanation.

Mock Interview and Daily Challenge

A mock interview gives you 30 questions in 30 minutes. A daily challenge of five questions keeps practice regular, and a mistakes list brings back what you got wrong.

Practise Code and Revise Fast

Write and run code in the practice area, and use key point cheat sheets for quick revision before an interview. Lessons, quizzes and projects also work offline.

Who It Helps

Beginners starting backend development.

JavaScript developers moving to the server side.

Job seekers preparing for Node.js interviews.

Learn Node.js one chapter and one project at a time, and you will be ready to build APIs and answer interview questions with confidence.

For any questions or feedback, write to us at learnsimpli19@gmail.com.