E-Commerce Platform

Fri, 15 Nov 2024 00:00:00 +0000

A modern, scalable e-commerce platform built from scratch with performance and user experience as top priorities.

Overview

Built a complete e-commerce solution for a mid-sized retail company looking to expand online. The platform handles everything from product catalog management to payment processing and order fulfillment.

Key Features

Customer-Facing

Product Catalog - Dynamic filtering, sorting, and search with instant results
Shopping Cart - Real-time inventory checking and price calculations
Checkout - Secure payment processing via Stripe with Apple Pay/Google Pay support
Order Tracking - Real-time order status updates with email notifications
User Accounts - Profile management, order history, and saved addresses

Admin Dashboard

Inventory Management - Real-time stock tracking and low-stock alerts
Order Management - Bulk order processing and fulfillment workflow
Analytics - Sales dashboards, customer insights, and revenue reporting
Product Management - Easy product creation with image uploads and variants

Technical Highlights

Performance Optimization

Implemented Redis caching reducing database queries by 70%
Optimized images with WebP format and lazy loading
Server-side rendering for critical pages improving SEO and load times
CDN integration for global content delivery

Scalability

Microservices architecture allowing independent scaling
Horizontal scaling with load balancing
Database read replicas for improved query performance
Message queues for async processing (order emails, inventory updates)

Security

JWT authentication with refresh tokens
Rate limiting to prevent abuse
Input validation and sanitization
PCI-compliant payment processing via Stripe

Architecture

┌─────────────┐ ┌──────────────┐ ┌─────────────┐
│ React SPA │────▶│ REST API │────▶│ PostgreSQL │
└─────────────┘ │ (Express) │ └─────────────┘
 └──────┬───────┘
 │
 ┌──────▼───────┐
 │ Redis │
 │ (Cache) │
 └──────────────┘

Challenges & Solutions

Challenge 1: Inventory Sync

Problem: Multiple users buying same product simultaneously causing overselling

Solution: Implemented optimistic locking with Redis to ensure inventory accuracy during concurrent purchases

Challenge 2: Payment Processing

Problem: Handling payment failures gracefully while maintaining order integrity

Solution: Built robust state machine for order processing with automatic retry logic and customer notifications

Challenge 3: Performance at Scale

Problem: Slow page loads during traffic spikes

Solution: Implemented multi-layer caching strategy (CDN, Redis, in-memory) and database query optimization

Results

Performance: 60% faster page load times compared to previous platform
Conversion: 25% increase in conversion rate due to improved UX
Uptime: 99.9% uptime over 6 months in production
Scale: Successfully handled Black Friday with 10k concurrent users
Revenue: Processing over $50k in monthly transactions

Tech Stack Details

Frontend

React 18 with TypeScript
Tailwind CSS for styling
React Query for data fetching
React Hook Form for forms

Backend

Node.js with Express
PostgreSQL with Prisma ORM
Redis for caching and sessions
Bull for job queues

Infrastructure

Docker containers
AWS EC2 for hosting
AWS S3 for image storage
Cloudflare CDN
GitHub Actions for CI/CD

Payment & Services

Stripe for payments
SendGrid for emails
Sentry for error tracking

Future Improvements

Mobile app (React Native)
Multi-language support
Wishlist and product recommendations
Live chat support
Advanced analytics dashboard

Screenshots

(Screenshots would go here in production)

Lessons Learned

Start with Performance: Built with performance in mind from day one rather than optimizing later
Testing Matters: Comprehensive test suite caught critical bugs before production
Monitor Everything: Proper logging and monitoring essential for maintaining uptime
User Feedback: Regular user testing revealed UX issues we wouldn’t have found otherwise

Project Status: ✅ Live in Production
GitHub:
Demo:

E-Commerce |