Company guides
Practice system-design questions reported in interviews at these companies.
Based on public candidate reports; companies have not confirmed these questions.
a URL shortener, one machine
A design walkthrough you can build from.
Reported in interviews at Amazon, Google, Microsoft.
rate limiting and abuse prevention
A design walkthrough you can build from.
Reported in interviews at Stripe, Cloudflare, Amazon.
a URL shortener at scale
A design walkthrough you can build from.
Reported in interviews at Amazon, Google, Bloomberg.
a product listing
A design walkthrough you can build from.
Reported in interviews at Amazon, Flipkart, Shopify.
a collaborative editor
A design walkthrough you can build from.
Reported in interviews at Google, Figma, Notion.
an object store (S3)
A design walkthrough you can build from.
Reported in interviews at Amazon, Dropbox, Microsoft.
a Kafka-style log
A design walkthrough you can build from.
Reported in interviews at LinkedIn, Confluent, Uber.
a notification system
A design walkthrough you can build from.
Reported in interviews at Meta, Uber, Airbnb.
a ticket booking system
A design walkthrough you can build from.
Reported in interviews at Amazon, BookMyShow, Uber.
a payment system
A design walkthrough you can build from.
Reported in interviews at Stripe, PayPal, Amazon.
autocomplete
A design walkthrough you can build from.
Reported in interviews at Google, Amazon, LinkedIn.
a search service
A design walkthrough you can build from.
Reported in interviews at Google, Elastic, Amazon.
a recommendation system
A design walkthrough you can build from.
Reported in interviews at Netflix, Spotify, Meta.
chat and messaging
A design walkthrough you can build from.
Reported in interviews at Meta, Slack, Discord.
a social feed
A design walkthrough you can build from.
Reported in interviews at Meta, Twitter, LinkedIn.
nearby search
A design walkthrough you can build from.
Reported in interviews at Uber, DoorDash, Yelp.
ride matching
A design walkthrough you can build from.
Reported in interviews at Uber, Lyft, DoorDash.
a video platform
A design walkthrough you can build from.
Reported in interviews at YouTube, Netflix, Meta.
a file sync service
A design walkthrough you can build from.
Reported in interviews at Dropbox, Google, Microsoft.
observability and SLOs
A design walkthrough you can build from.
Reported in interviews at Datadog, Google, Netflix.
a database migration
A design walkthrough you can build from.
Reported in interviews at Stripe, GitLab, Shopify.
a photo-sharing interview
A design walkthrough you can build from.
Reported in interviews at Meta, Pinterest, Snap.