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6/26/2026

The original title is: "Building an Anti-Proxy -Offline-First Attendance Platform with Next.js, Express & Firebase"
Original: Building an Anti-Proxy -Offline-First Attendance Platform with Next.js, Express & Firebase
Short summary
A solo developer shares their design and implementation of an offline-first attendance system that prevents proxy sign-ins through dynamic QR authentication. Built with Next.js, React, TypeScript, Express, and Firebase, the platform prioritizes security, offline reliability, and UX. The article explores architectural decisions, technology choices, development challenges, and lessons learned from production deployment.
- •Offline-first anti-proxy attendance system with dynamic QR validation to prevent proxy attendance
- •Full-stack implementation using Next.js, React, Express, Firebase; deployed in production at a college club
- •Deep dive into architecture decisions, tech stack reasoning, and real-world development challenges
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