System Design Channel

High Level Design

Curated HLD problems to help you ace your design interview.

HLD

Design Twitter / X

Design a scalable social media platform. Focus on feed generation, tweet storage, and high availability.

Hard
HLD

Design URL Shortener

Design a service like TinyURL. Focus on database schema, unique ID generation, and redirection logic.

Medium
HLD

Design WhatsApp / Chat

Design a real-time messaging application. Focus on WebSockets, history storage, and user presence.

Hard