Shop Management System - FullStack POS Solution

Managing a small retail business involves juggling invoices, inventory, customers, and financial records — all while trying to serve customers efficiently. I built a Shop Management System to solve these exact challenges, creating a full-featured POS that streamlines daily operations.

The Challenge

Traditional shop management involves:

• Manual invoice creation and tracking
• Spreadsheet-based inventory management
• Disconnected customer and vendor records
• No real-time financial visibility
• Difficulty tracking payment statuses

Small businesses deserve better tools without enterprise-level costs.

The Solution

Shop Management System is a comprehensive POS built with the PERN stack (PostgreSQL, Express, React, Node.js) that handles everything from invoicing to inventory tracking.

Core Features

📊 Real-Time Dashboard

Get instant insights into your business:

• Total inventory count and stock status
• Daily, weekly, and monthly sales/revenue
• Purchase and expense tracking
• Visual performance indicators

🧾 Complete Invoice Management

Create, download, and print invoices for:

• Sales transactions
• Purchase orders
• Business expenses
• Track payment status: Paid, Partial, Unpaid

📦 Smart Inventory Tracking

• Real-time stock level monitoring
• Automated low-stock alerts
• Product details and categorization
• Reorder suggestions

👥 Customer & Vendor Management

• Store contact information (names, phones, addresses)
• Track one-time and recurring relationships
• Access complete transaction history
• Better communication and service

💰 Financial Transaction Logging

• Daily/weekly/monthly balance tracking
• Complete audit trail of all transactions
• Expected vs. actual balance reports
• Identify discrepancies quickly

⚡ Payment Status Tracking

• Automatic payment status updates
• Alerts for unpaid invoices
• Partial payment handling
• Avoid overdue payment issues

Tech Stack

// Frontend
- React with Redux for state management
- Responsive, intuitive UI design
- Client-side routing and validation
 
// Backend
- Node.js + Express RESTful API
- JWT-based authentication
- Comprehensive CRUD operations
 
// Database
- PostgreSQL for reliable data storage
- Prisma ORM for type-safe queries
- Optimized database schema
 
// Security
- JSON Web Tokens (JWT)
- Secure password hashing
- Role-based access control

Architecture Highlights

Type Safety Throughout

• TypeScript on both frontend and backend
• Prisma schema for database type generation
• Redux toolkit for predictable state management

Performance Optimized

• Efficient database queries with Prisma
• Optimistic UI updates with Redux
• Lazy loading and code splitting

Scalable Design

• RESTful API architecture
• Modular component structure
• Environment-based configuration

Installation

# Clone the repository
git clone https://github.com/abdulrehmanwaseem/Shop-Management-System.git
 
# Install client dependencies
cd client
npm install
 
# Install server dependencies
cd ../server
npm install
 
# Set up environment variables
# Create .env files in both client and server directories
 
# Run the application
npm run dev

Environment Configuration

Client (.env)

VITE_SERVER_BASE_URL=your_server_api_url

Server (.env)

PORT=your_port_value
DATABASE_URL=your_database_url
JWT_SECRET=your_jwt_secret_value
JWT_EXPIRES_IN=your_jwt_expires_in_value

Continuous Improvement

This project is actively maintained with:

• Weekly bug fixes and improvements
• New reporting features
• Performance optimizations
• Enhanced user experience

Since initial development, the system has undergone rigorous testing and regular updates to ensure reliability and add requested features.

Live Demo

Check out the live application: shop-management-system-pos.vercel.app

Open Source

The project is available on GitHub under the MIT License. Contributions, feedback, and feature requests are welcome!

Real-World Impact

This system demonstrates:

• Full-stack development capabilities
• Database design and optimization
• Authentication and authorization
• State management at scale
• Production-ready deployment

Perfect for small retail businesses looking for an affordable, feature-rich POS solution.

Conclusion

Building this Shop Management System taught me valuable lessons about designing software for real-world business needs — balancing feature richness with usability, ensuring data integrity, and creating interfaces that non-technical users can navigate confidently.

If you're looking for a comprehensive POS solution or want to see full-stack PERN development in action, check out the live demo and source code!

Built with ❤️ for small businesses.