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Build Scalable E-commerce

Complete backend system with Node.js, Express, and MongoDB. Ready for production scale.

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Tech Stack

Built with modern technologies for maximum performance and scalability

Backend Framework

Node.js with Express.js for fast, scalable server-side applications

Node.js Express.js TypeScript

Database

MongoDB with Mongoose ODM for flexible, document-based storage

MongoDB Mongoose

Authentication

JWT-based authentication with bcrypt for secure password hashing

JWT bcrypt
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Architecture

Clean, modular architecture built for scale and maintainability

Layered Architecture

Controllers Layer

Handle HTTP requests and responses

Services Layer

Business logic and data processing

Models Layer

Database schemas and validations

Middleware Layer

Authentication, validation, error handling

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Folder Structure

src/
├── controllers/
├── services/
├── models/
├── middleware/
├── routes/
├── utils/
└── config/

Database Design

NoSQL database schema optimized for e-commerce operations

MongoDB Schema

Core Collections

  • • users (authentication, profiles)
  • • products (inventory, pricing)
  • • categories (hierarchical structure)
  • • orders (purchase history)
  • • carts (session management)

Supporting Collections

  • • payments (transaction records)
  • • inventory (stock tracking)
  • • reviews (product feedback)
  • • coupons (discount system)
  • • sessions (user state)
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User Schema Example

{
email: String (unique, required)
password: String (hashed)
role: String (user|admin)
profile: {
name: String
address: String
phone: String
},
createdAt: Date
updatedAt: Date
}

API

Complete RESTful API with comprehensive endpoints for every operation

Core Endpoints

POST /api/auth/register User registration

Create new user account

POST /api/auth/login User authentication

Authenticate user and get JWT token

GET /api/products Product listing

Get all products with pagination

POST /api/orders Order creation

Create new order from cart

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Authentication Flow

// Register User
POST /api/auth/register
// Request Body
{
"email": "user@example.com",
"password": "securepassword",
"name": "John Doe"
}

Business Logic

Core business rules and automated workflows for seamless e-commerce operations

Core Workflows

Cart Sync

Real-time cart synchronization across devices

  • • Guest cart merging
  • • Stock validation
  • • Price updates

Inventory Management

Automatic stock reduction and alerts

  • • Real-time stock updates
  • • Low stock notifications
  • • Out-of-stock handling

Order Lifecycle

Complete order state management

  • • Status tracking
  • • Payment processing
  • • Shipping updates

Discount System

Flexible coupon and discount engine

  • • Percentage discounts
  • • Fixed amount coupons
  • • Expiry validation
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Security

Enterprise-grade security with multi-layer protection

Security Features

JWT Authentication

Stateless authentication with secure tokens

  • • 24-hour token expiry
  • • Refresh token rotation
  • • Blacklist management

Role-Based Access

Granular permission system

  • • Admin privileges
  • • User restrictions
  • • API endpoint protection

Rate Limiting

DDoS protection and abuse prevention

  • • 100 requests per minute
  • • IP-based tracking
  • • Automatic blocking

Input Validation

Comprehensive data sanitization

  • • SQL injection prevention
  • • XSS protection
  • • Schema validation
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Password Security

bcrypt with salt rounds for maximum protection

HTTPS Only

SSL/TLS encryption for all communications

CORS Protection

Origin-based access control

Deployment

Production-ready deployment with Docker, CI/CD, and cloud platforms

Deployment Strategy

Docker Containerization

Lightweight, scalable container deployment

  • • Multi-stage builds
  • • Environment variables
  • • Health checks

CI/CD Pipeline

Automated testing and deployment

  • • GitHub Actions
  • • Automated testing
  • • Zero-downtime deploys

Cloud Platforms

Multiple hosting options

  • • AWS ECS/Fargate
  • • Vercel/Render
  • • DigitalOcean
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Deployment Steps

1

Build

Docker image creation

2

Test

Automated testing

3

Deploy

Cloud deployment

4

Monitor

Live monitoring

Code

Production-Ready Code Samples

Copy-paste ready controllers, models, and services

// User Controller
export class UserController {
  async register(req, res) {
    const user = await UserService.create(req.body);
    return res.json(user);
  }
}
// Product Model
@Entity('products')
export class Product {
  @PrimaryGeneratedColumn()
  id: number;
  @Column()
  name: string;
}
// Order Service
export class OrderService {
  async createOrder(items, userId) {
    // Validation & inventory check
    return order;
  }
}
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