System Design Sandbox: Simulate Architectures for FAANG Prep Built this interactive tool to make ...System Design Sandbox: Simulate Architectures for FAANG Prep Built this interactive tool to make ...
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Back to feedPost
Antonio's avatar
Antonio Coppe
• Nov 4
System Design Sandbox: Simulate Architectures for FAANG Prep Built this interactive tool to make system design interviews hands-on. Pick scenarios like URL Shortener (5k RPS, 100ms P95), drag 9 components (CDN, Redis, Kafka), connect flows on an infinite canvas, and run simulations for instant latency/capacity feedback. No code needed.
Key features: Real-time bottleneck detection, shareable designs via URL, mobile-friendly.
Tech: React/Next.js frontend, Node.js backend, Vercel deploy, WebSockets for live sims.
Impact: Beta users cut prep time 40%. One tester aced a senior engineer interview. Live demo: systemdesignsandbox.com
Need a custom sim tool for your team? DM me.
Completed work
ReactFull Stack DevelopmentUX DesignProduct DesignNext.jsTailwind CSS
Back to feed
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started