This project is a Dynamic QR Code Generator, a web platform designed to create, manage, and monitor QR codes that redirect to customizable URLs. The solution was built with a strong focus on usability, performance, and scalability using React, Node.js, and Express.
Features
- Dynamic QR Code Generation: Users can generate QR codes linked to modifiable URLs without changing the QR itself.
- Link Management: Full control over destination URLs, expiration dates, and access rules.
- Analytics Dashboard: View usage statistics including scan counts, locations, and timestamps.
- User Authentication: Secure login system with token-based sessions to manage personal QR code libraries.
Technical Details
- Frontend: Developed with React and Tailwind CSS to ensure a clean, responsive UI across devices.
- Backend: Built with Node.js and Express, with routes for QR generation, URL redirection, and analytics logging.
- Database: MongoDB used for storing user data, QR metadata, and access logs.
- QR Code Engine: Integrated
qrcodeandshortidlibraries to generate and manage unique codes and short URLs. - Deployment: Containerized with Docker and deployed using Railway for seamless CI/CD.
Challenges and Learnings
A key challenge was designing an efficient and secure redirection mechanism that logs access data without impacting latency. I implemented middleware to asynchronously log scan events, ensuring redirection remained fast. I also enforced best practices in API design, securing routes with JWT authentication and sanitizing inputs to prevent injection attacks.
This project strengthened my full-stack engineering skills, particularly in designing secure REST APIs, managing stateful frontends, and optimizing for performance and scalability.
Future Improvements
- Role-based access for teams managing multiple QR campaigns.
- Support for A/B testing of redirection URLs.
- Exportable analytics reports in CSV/PDF format.
- Integration with external marketing tools via webhook.