Backend Developer Intern Assessment

A full-stack User Management System built as part of the PurpleMerit Backend Developer Intern Assessment.
The project demonstrates secure authentication, role-based access control, admin operations, and a modern, responsive frontend with professional UX patterns.

This application allows users to sign up, log in, manage their profile, and securely change passwords.
Admins can manage users through a dedicated dashboard with pagination and activation/deactivation controls.

The focus of this project is:

• Clean backend architecture
• Secure authentication & authorization
• Practical admin workflows
• Professional frontend UX

• Node.js
• Express.js
• MongoDB Atlas
• Mongoose
• JWT (Authentication)
• bcrypt (Password Hashing)
• Jest + Supertest (Testing)

• React (Vite)
• Tailwind CSS (v4)
• Axios
• React Router DOM
• Context API

• Frontend: Vercel
• Backend: Render / Railway
• Database: MongoDB Atlas

• User signup and login
• JWT-based authentication
• Secure password hashing
• Protected routes
• Role-based access control (Admin / User)

• View all users in a paginated table (10 users per page)
• Activate / deactivate users
• Confirmation dialogs before actions
• Success & error notifications

• View profile details
• Edit profile (name & email) via modal
• Change password via modal
• Save / cancel actions
• Secure password update flow

• Clean black & white theme
• Responsive design (desktop & mobile)
• Loader indicators during API calls
• Toast notifications for feedback
• Blurred modal overlays for better UX

purplemerit-user-management/
│
├── backend/
│ ├── src/
│ │ ├── controllers/
│ │ ├── models/
│ │ ├── routes/
│ │ ├── middleware/
│ │ ├── config/
│ │ └── tests/
│ └── server.js
│
├── frontend/
│ ├── src/
│ │ ├── pages/
│ │ ├── components/
│ │ ├── context/
│ │ ├── services/
│ │ └── utils/
│ └── main.jsx
│
└── README.md

PORT=5000
MONGO_URI=<YOUR_MONGODB_ATLAS_URI>
JWT_SECRET=<YOUR_JWT_SECRET>

VITE_API_BASE_URL=<Your backend api>

git clone <YOUR_GITHUB_REPO_URL>
cd purplemerit-user-management

cd backend
npm install
npm run dev

cd frontend
npm install
npm run dev

Backend unit and integration tests are included.

cd backend
npm test

• POST /api/auth/signup

• POST /api/auth/login

• GET /api/users/profile

• PATCH /api/users/profile

• PATCH /api/users/change-password

• GET /api/users

• PATCH /api/users/:id/activate

• PATCH /api/users/:id/deactivate

All protected routes require a valid JWT token.

This application supports role-based access control.

To test admin-specific features such as user listing and activation/deactivation, admin credentials are shared separately via email as part of the submission, to avoid exposing sensitive data in a public repository.

• Frontend (Vercel):https://purplemerit-user-management-fronten.vercel.app/
• Backend (Railway):https://purplemerit-user-management-backend.onrender.com/

Saras Mishra Backend Developer Intern Candidate

• GitHub:https://github.com/Sarasmishra

• LinkedIn:https://www.linkedin.com/in/saras-mishra-dev/