QKart Backend

• Live URL: QKart Backend
• Backend live URL: QKart Backend - Vercel

QKart is an E-commerce application offering a variety of products for customers to choose from.

QKart Layered Architecture

Deploy the QKart backend server

Scope of Work

• Created a MongoDB instance on MongoDB Atlas cloud and uploaded products data to the cloud DB.
• Deployed the QKart Node.js app to Heroku.
• Deployed the QKart React frontend to Netlify after configuring it to use the deployed Node.js backend.

Skills used

MongoDB Atlas, Deployment, Heroku, Netlify

Complete the checkout logic using TDD

Scope of Work

• Added Jest-based assertions to unit tests for checkout requirements provided.
• Implemented the checkout logic in a Test-driven development style.
• Utilized integration tests to find and resolve bugs on integrating checkout logic to the application.

Skills used

Test-driven development, Unit testing, Integration testing, Jest framework

Implement APIs related to shopping cart

Scope of Work

• Implemented the GET/POST/PUT API endpoints for a user’s shopping cart.
• Improved the GET /v1/users endpoint by supporting filtering for user address via query parameters.

Skills used

REST APIs, Filtered API Queries

Secure API endpoints and implement register/login APIs

Scope of Work

• Implemented logic to generate short-lived JWT tokens.
• Set token authentication strategy by using the Passport library.
• Secured GET /v1/users endpoint using token authentication.
• Created POST APIs for user registration and login.
• Implemented password authentication to facilitate register/login flow.

Skills used

REST APIs, Token authentication, JWT Token, Password authentication, Hashing

JWT Token authentication flow for QKart APIs

Set up application and implement the first API

Scope of Work

• Implemented GET /v1/users API endpoint to send user data to clients.
• Followed a layered approach to implement the request-response cycle for ease of maintenance.
• Used Mongoose (Node.js-MongoDB ODM) to fetch user data from MongoDB.
• Defined JOI schema to easily validate client requests.
• Utilized middlewares to reduce code duplication.

Skills used

Node.js, Express.js, MongoDB, Mongoose ODM, JOI validation

Request-response cycle in QKart (Endpoint: /v1/users)