Hello everyone,
If you participate in contests across multiple platforms, keeping track of different schedules can get messy. I created AlgoRadar, a lightweight Chrome extension to help you view all upcoming competitive programming events in a single place.
✨ Features at a glance:
- All Major Platforms: One interface for Codeforces, LeetCode, AtCoder, CodeChef, and more soon.
- Smart Filtering: Switch quickly between contests happening "Today", "This Week", or "This Month".
- Live Countdown Timers: Shows you exactly how much time is left until the register/start time, automatically adapted to your computer's local timezone.
- Lightweight Performance: Only 88 KiB in size with a clean dark theme. It works seamlessly in the background with auto-caching.
Technical Implementation & Architecture
- No Client-Side Lag: Instead of hammering external APIs or scraping schedules on every popup click, the architecture relies on system-level timezone synchronization.
- Hybrid Data Fetching: To bypass common Cloudflare bot protection and 403 blocks faced by standard crons, the backend uses cached, static endpoints served via serverless architecture.
- Lightweight Sync: The extension auto-refreshes data in the background every 20 minutes, ensuring zero cold starts and instant popup loading times.
The project is 100% open-source and respects your privacy (no ads, no credentials exposed, no background data tracking).
Check it out and let me know your thoughts!
