Overview

A comprehensive e-commerce solution featuring a responsive storefront, shopping cart management, secure payment processing via Stripe, and a powerful admin dashboard for managing products, orders, and customers.

The application uses React for the frontend with TypeScript for type safety, Node.js and Express for the backend API, and PostgreSQL for reliable data storage.

Key Features

• Product Catalog - Search and filter products with advanced filtering options
• Shopping Cart - Real-time cart updates with persistent storage
• Secure Checkout - Stripe integration for secure payment processing
• Admin Dashboard - Complete product, order, and customer management
• Order Tracking - Real-time order status updates and history
• Responsive Design - Optimized for all devices from mobile to desktop
• Email Notifications - Automated order confirmations and shipping updates

Technical Highlights

Frontend Architecture

Built with React and TypeScript, the frontend uses a component-based architecture with custom hooks for state management. The shopping cart state is persisted across sessions using local storage, while API calls are managed through a custom axios wrapper with automatic retry logic.

Backend API

The REST API is built with Express and follows best practices for security, including JWT authentication, rate limiting, and input validation. Database queries are optimized with proper indexing and connection pooling.

Payment Integration

Implemented Stripe Checkout for secure payment processing, with webhook handlers for asynchronous payment verification and order fulfillment.

Challenges & Solutions

Challenge: Managing cart state across user sessions and handling edge cases like out-of-stock items.

Solution: Implemented a hybrid state management approach using React Context for in-memory state and localStorage for persistence. Created a reconciliation system that validates cart items against current inventory on page load.

Challenge: Ensuring secure payment flows and preventing double-charges.

Solution: Implemented idempotency keys for Stripe API calls and used database transactions to ensure atomic order creation. Added comprehensive error handling and user-friendly error messages.

What I Learned

• Deepened understanding of payment gateway integration and PCI compliance
• Mastered state management at scale with React Context and custom hooks
• Built secure authentication systems with JWT and refresh tokens
• Optimized PostgreSQL queries for better performance under load
• Implemented comprehensive error handling and logging strategies