Backend Development
Server-side development with Node.js, NestJS, Spring Boot, Python backends, sockets, Nginx and payment integration.
Module 1: RESTful API Fundamentals
REST Representational State Transfer is the dominant architectural style for web APIs. This module covers concepts you need before building backends with any framework.
Read article →RESTful API Best Practices
Practical guidelines for designing and implementing productionquality REST APIs.
Read article →Module 2: Python FastAPI
FastAPI is a modern, highperformance Python web framework for building APIs. It uses type hints and Pydantic for validation and automatically generates OpenAPI Swagger documentation.
Read article →Module 3: Python Flask
Flask is a lightweight microframework for Python. You can build REST APIs, serverrendered web apps with templates Jinja2, or both.
Read article →Module 4: Node.js Backend Development
Node.js lets you build backend services in JavaScript or TypeScript using the same language as the browser. Express is the most common web framework for REST APIs.
Read article →Module 5: Nest.js Backend Development
Nest.js is a TypeScriptfirst backend framework built on Node.js. It uses modules, dependency injection, and decorators similar to Angular, and is wellsuited for scalable REST APIs and microservices.
Read article →Module 6: SQL Databases for Backend
Relational databases SQL store data in tables with rows and columns, linked by relationships and foreign keys. They are the default choice for structured, transactional data in backend applications.
Read article →Module 7: NoSQL Databases for Backend
NoSQL databases use storage models other than traditional relational tables. Common types: document e.g. MongoDB, keyvalue e.g. Redis, widecolumn e.g. Cassandra, graph e.g. Neo4j. This module focuses on document stores M
Read article →Backend Tech Stack — Quick Reference
Onepage reference for REST, Python FastAPI/Flask, Node.js/Nest.js, and SQL/NoSQL.
Read article →Backend Development Training Materials
Comprehensive training materials for backend development, covering RESTful APIs, Python FastAPI & Flask, Node.js, Nest.js, and SQL/NoSQL databases.
Read article →📘 Comprehensive JSON Guide
1. What is JSON?whatisjson 2. Why JSON?whyjson 3. JSON Syntaxjsonsyntax 4. JSON Data Typesjsondatatypes 5. JSON Examplesjsonexamples 6. JSON in RESTful APIsjsoninrestfulapis 7. JSON in NestJSjsoninnestjs 8. Common JSON O
Read article →Beginner Level: NestJS Fundamentals
1. Introduction to NestJSintroductiontonestjs 2. Project Setupprojectsetup 3. Understanding the Project Structureunderstandingtheprojectstructure 4. Controllers and Routescontrollersandroutes 5. Basic RESTful APIbasicres
Read article →Detailed Request Flow: GET /todos
This document explains stepbystep how NestJS handles the request curl http://localhost:3000/todos.
Read article →Beginner Level Complete Code Examples
This directory contains complete, runnable code examples for the beginner level.
Read article →development
circleciimage: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456 circleciurl: https://circleci.com/gh/nestjs/nest
Read article →Beginner Level Complete Code Examples
This directory contains complete, runnable code examples for the beginner level.
Read article →Intermediate Level: Core NestJS Concepts
1. Services and Dependency Injectionservicesanddependencyinjection 2. Middlewaremiddleware 3. Pipes Validation & Transformationpipesvalidationtransformation 4. Guards Authentication & Authorizationguardsauthenticationaut
Read article →Intermediate Level Complete Code Examples
This directory contains complete, runnable code examples demonstrating intermediate NestJS concepts.
Read article →Setup Instructions for Intermediate Code
1. Navigate to the code directory: bash cd 02intermediate/code
Read article →development
circleciimage: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456 circleciurl: https://circleci.com/gh/nestjs/nest
Read article →Advanced Level: Advanced NestJS Patterns
1. Advanced Decoratorsadvanceddecorators 2. Custom Providers & Factoriescustomprovidersfactories 3. Dynamic Modulesdynamicmodules 4. Microservicesmicroservices 5. WebSocketswebsockets 6. Testingtesting 7. Database Integr
Read article →Advanced Level Complete Code Examples
This directory contains complete, runnable code examples demonstrating advanced NestJS concepts.
Read article →How to Run Each Level
This guide explains how to run the code examples for each level.
Read article →📖 Complete Learning Guide
This comprehensive guide will take you from a NestJS beginner to an advanced developer.
Read article →