COMING SPRING 2026
System Design Katas
50+ LeetCode-style challenges for system design interviews. Practice with real constraints and instant feedback.
Challenges You'll Solve
FAANG-style system design scenarios with real constraints.
Design Netflix
Video streaming at scale with CDN, transcoding, and recommendations
Design Uber
Real-time ride matching, geolocation, and surge pricing
Design Twitter
News feed, fan-out strategies, and trending topics
Design WhatsApp
Real-time messaging, presence, and end-to-end encryption
Design YouTube
Video upload, processing pipeline, and view counting
Design URL Shortener
High-throughput redirects with analytics and expiration
Reserve Your Spot
Founding Member Badge
Your join date, permanently displayed.
Early Bird Pricing
Locked-in pricing during MVP period.
Year-One Discount
Discounted rate for your first year.
Shape the Product
Direct input on features and roadmap.
While you wait, explore our system design articles →