Design Studio
Drag components onto a canvas, draw the flow, and get Aria's interviewer review — the skill that decides final rounds.
Available Now
Design a URL Shortener
Build a system like bit.ly — billions of redirects, sub-20ms latency, globally available.
Design a Chat System
Build real-time 1:1 and group messaging at WhatsApp scale — 50B messages per day.
Design a Social Media Feed (Twitter/X)
Build a real-time feed for 300M daily users — fan-out at scale, celebrity problem, and sub-100ms timeline loads.
Design a Video Streaming Platform (Netflix)
Stream to 220M subscribers at 15% of global internet traffic — transcoding pipelines, CDN at scale, and adaptive bitrate.
Design an E-Commerce Platform (Amazon/Flipkart)
Handle 300M products, 100K orders/day peak, and flash sales — without overselling a single unit.
Design a Ride-Sharing App (Uber/Ola)
Build a global ride-sharing platform — 25M trips/day, 5M drivers online, sub-second driver matching.
Design a Notification System
Build a multi-channel notification platform — 10M notifications/day across push, email, and SMS.
Design a Distributed Cache
Build a Redis Cluster — consistent hashing, sub-millisecond reads, cache stampede protection, and automatic failover.
Design a Rate Limiter
Protect your API from abuse and overload — enforce per-user, per-IP, and global request quotas at millisecond latency.
Design a Video Streaming Platform
Build a YouTube-style platform — chunked uploads, multi-resolution transcoding, HLS delivery, and adaptive bitrate streaming at global CDN scale.
Design Search Autocomplete
Build a typeahead system like Google Search — returning top-K suggestions in under 100ms for billions of daily queries.
Design Dropbox / Google Drive
A file storage + sync service — upload once, see it instantly on every device, at petabyte scale.
Design Ticketmaster / BookMyShow
An event ticketing system — browse events, hold a seat, pay, and confirm, without ever double-booking a seat.
Design Instagram
A photo-sharing social network — upload media, follow people, and load a personalized home feed in milliseconds.