Projects |

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:

TaskFlow - Project Management Tool

Fri, 20 Sep 2024 00:00:00 +0000

A modern, intuitive task management tool built for remote teams. Features real-time collaboration, customizable workflows, and beautiful UI.

Overview

TaskFlow was born out of frustration with existing project management tools being either too complex or lacking essential features. I built a solution that’s powerful yet simple to use.

Key Features

Core Functionality

Kanban Boards - Drag-and-drop interface for visual task management
Real-Time Sync - See changes instantly as team members update tasks
Multiple Views - Switch between Kanban, List, and Calendar views
Task Details - Rich descriptions, attachments, comments, and checklists
Labels & Filters - Organize and find tasks quickly

Collaboration

Team Workspaces - Separate spaces for different projects/teams
@Mentions - Tag team members in comments for notifications
Activity Feed - Track all changes and updates
Permissions - Role-based access control (admin, member, viewer)

Productivity

Keyboard Shortcuts - Power user features for faster navigation
Templates - Reusable board templates for common workflows
Due Dates & Reminders - Never miss a deadline
Time Tracking - Built-in timer for task duration tracking

Technical Implementation

Real-Time Features

Used WebSockets (Socket.io) for instant updates across all connected clients. Implemented optimistic UI updates for snappy user experience even before server confirmation.

Drag & Drop

Built custom drag-and-drop using react-beautiful-dnd with smooth animations and mobile touch support.

Performance

Implemented virtual scrolling for boards with 1000+ tasks
Optimized database queries with proper indexing
Used Redis for session storage and caching
Image optimization with Next.js Image component

Authentication

Secure auth with NextAuth.js
Support for email/password and OAuth (Google, GitHub)
JWT tokens with automatic refresh

Architecture

Built as a modern monolith with Next.js API routes:

┌─────────────┐ ┌──────────────┐ ┌─────────────┐
│ Next.js │────▶│ API Routes │────▶│ PostgreSQL │
│ (React) │ │ (REST/WS) │ │ + Prisma │
└─────────────┘ └──────────────┘ └─────────────┘
 │ │
 │ ┌──────▼───────┐
 └────────────▶│ Socket.io │
 │ (Real-Time) │
 └──────────────┘

Challenges Solved

Real-Time Conflicts

Problem: Multiple users editing same task simultaneously

Solution: Implemented operational transformation (OT) for conflict resolution and last-write-wins strategy with conflict notifications

Mobile Performance

Problem: Drag-and-drop laggy on mobile devices

Solution: Optimized touch handlers and reduced re-renders using React.memo and useMemo

Scale

Problem: Growing user base causing performance issues

Solution: Added Redis caching layer and optimized database queries, reducing response time by 65%

Results

📈 Users: 2000+ active users within 3 months
⭐ Product Hunt: Featured and received 200+ upvotes
🚀 Performance: Sub-100ms API response times
💯 Uptime: 99.8% uptime since launch
📱 Mobile: 40% of traffic from mobile devices

Tech Stack

Frontend

Next.js 14 (App Router)
TypeScript
Tailwind CSS
Framer Motion (animations)
React Beautiful DnD

Backend

Next.js API Routes
Prisma ORM
PostgreSQL
Socket.io for WebSockets
NextAuth.js for authentication

Infrastructure

Vercel for hosting
Supabase for PostgreSQL
Redis Cloud for caching
AWS S3 for file storage

User Feedback

“Finally, a task manager that doesn’t get in my way. The real-time updates are magical!” - Sarah K., Product Manager

“We switched from Trello and haven’t looked back. TaskFlow is faster and more intuitive.” - Mike R., Engineering Lead

Open Source

TaskFlow is open source! Contributions welcome.

License: MIT
GitHub:
Demo:

What’s Next

Currently working on:

Mobile apps (iOS & Android)
Gantt chart view
Advanced reporting and analytics
API for third-party integrations
Offline mode support

Status: ✅ Live & Actively Maintained
Try it:

WeatherNow - Real-Time Weather App

Mon, 10 Jun 2024 00:00:00 +0000

A fast, beautiful weather application that provides real-time weather data, forecasts, and interactive maps. Built as a Progressive Web App with offline support.

Overview

WeatherNow started as a weekend project to learn PWA development. It evolved into a fully-featured weather app used by thousands of people daily.

Features

Weather Data

Current Conditions - Real-time weather for any location
7-Day Forecast - Detailed daily forecasts with hourly breakdown
Weather Alerts - Severe weather notifications
Historical Data - Past weather data and trends

User Experience

Location Detection - Automatic location based on GPS or IP
Search - Find weather for any city worldwide
Favorites - Save frequently checked locations
Units - Toggle between metric and imperial
Dark Mode - Automatic or manual theme switching

Progressive Web App

Offline Support - Access cached data without internet
Install - Add to home screen like a native app
Fast - Optimized for performance (Lighthouse 100)
Responsive - Perfect on any device

Technical Highlights

Performance

Achieved 100/100 Lighthouse score across all categories
Implemented service workers for offline functionality
Optimized bundle size: < 150KB gzipped
Lazy loading for images and components
Prefetching for instant navigation

Data Management

Smart caching strategy with stale-while-revalidate
Background sync for updated forecasts
Efficient API usage with request batching
Local storage for user preferences

UI/UX

Smooth animations with Framer Motion
Interactive weather map with Mapbox
Weather icons that match current conditions
Accessible (WCAG AA compliant)

API Integration

Integrated multiple weather APIs for comprehensive data:

// Example: Fetching weather data
const fetchWeather = async (lat: number, lon: number) => {
 const response = await fetch(
 `https://api.openweathermap.org/data/2.5/weather?lat=${lat}&lon=${lon}&appid=${API_KEY}`
 )
 return response.json()
}

Architecture

┌─────────────┐ ┌──────────────┐
│ React App │────▶│ OpenWeather │
│ (Vite) │ │ API │
└──────┬──────┘ └──────────────┘
 │
 │ ┌──────────────┐
 └───────────▶│ Mapbox │
 │ API │
 └──────────────┘

Challenges

Challenge: API Rate Limits

Solution: Implemented intelligent caching and request batching to stay within free tier limits while maintaining data freshness

Challenge: Offline Experience

Solution: Service workers with cache-first strategy for UI, network-first for data with graceful fallbacks

Challenge: Performance on Slow Networks

Solution: Image optimization, code splitting, and Progressive rendering for instant perceived performance

Results

📈 Users: 5000+ monthly active users
⚡ Performance: 100 Lighthouse score
📱 PWA: 40% of users installed as app
🌍 Global: Users from 50+ countries
⭐ Rating: 4.8/5 average user rating

Tech Stack

Frontend

React 18
TypeScript
Tailwind CSS
Framer Motion
Vite (build tool)

APIs

OpenWeather API
Mapbox GL JS
IP Geolocation API

Tools

Workbox (PWA)
React Query (data fetching)
Zustand (state management)

Hosting

Netlify
Cloudflare CDN

Open Source

This project is open source and welcomes contributions!

License: MIT
GitHub:

Lessons Learned

PWAs are powerful: Service workers enable app-like experiences on the web
Performance matters: Users notice and appreciate fast apps
Caching strategy: Critical for offline support and API cost management
Simplicity wins: Started with core features, added more based on user feedback

Future Plans

Weather widgets for websites
Social features (share weather conditions)
Weather photography integration
Apple Watch & Android Wear apps
Premium features (ad-free, extended forecasts)

Status: ✅ Live & Maintained
Try it:
GitHub: