My InterviewsPracticeLearnPricingAbout
Theme

Consistency & Trade-offs System Design Questions

11 design prompts lean on consistency & trade-offs. Each one runs on a whiteboard canvas with AI feedback graded against a hidden rubric.

New to consistency & trade-offs? There's a free 5-lesson interactive course (~51 min) with animated architectures and runnable simulations. Learn the concept first →

Design problems

Rate Limiter

Junior

Design a distributed rate limiter for a company's public APIs.

CachingLoad Balancing & Scaling

Unique ID Generator

Junior

Design a distributed unique ID generation service like Twitter Snowflake.

Database Scaling

Chat Messaging

Mid/Senior

Design a real-time chat and messaging service like WhatsApp or Messenger.

Database ScalingQueues & Async Processing

Collaborative Editor

Staff

Design a real-time collaborative document editor like Google Docs.

Queues & Async Processing

File Sync

Mid/Senior

Design a file sync and storage service like Dropbox or Google Drive.

Database ScalingQueues & Async Processing

Distributed Cache

Mid/Senior

Design a distributed in-memory cache like Redis or Memcached.

CachingLoad Balancing & Scaling

Message Queue

Mid/Senior

Design a distributed message queue like Kafka or SQS.

Load Balancing & ScalingQueues & Async Processing

Ride Matching

Staff

Design the ride-hailing dispatch and matching system for a service like Uber or Lyft.

Load Balancing & ScalingQueues & Async Processing

Ticketing System

Mid/Senior

Design an event ticketing system like Ticketmaster.

Database ScalingQueues & Async Processing

Payment Processing

Staff

Design a payment processing system like Stripe.

Database ScalingQueues & Async Processing

Ad Click Aggregator

Staff

Design a real-time ad click aggregation system.

Database ScalingQueues & Async Processing

Want the pressure version? Any of these can run as a live 45-minute design interview with follow-up questions and a verdict. Set up a design interview