SystemDesign.io — Curated System Design Interview Questions & Solutions

#	Question	Companies	Complexity
1	Design a URL Shortening service like TinyURL Solutions available	Google Facebook Amazon Microsoft	Easy
2	Design Pastebin Solutions available	Amazon Vanta Nutanix	Easy
3	Design Instagram Solutions available	Facebook Microsoft Twitter Amazon	Easy
4	Design Dropbox or Google Drive Solutions available	Dropbox Facebook Google Amazon	Medium
5	Design Facebook Messenger or WhatsApp Solutions available	Facebook Uber TikTok Amazon	Medium
6	Design Twitter for millions of users Solutions available	Uber Coupang	Easy
7	Design Youtube or Netflix Solutions available	Facebook Amazon Snowflake Wealthfront	Medium
8	Design Typeahead Suggestion/Autocomplete Solutions available	Facebook Google Expedia Bloomberg	Hard
9	Design an API Rate Limiter Solutions available	Amazon Atlassian Uber Patreon	Hard
10	Design a Distributed Metrics Logging and Aggregation System Solutions available	Google Facebook Amazon eBay	Very Hard
11	Design a Distributed Stream Processing System like Kafka Solutions available	Amazon Microsoft Wise Confluent	Very Hard
12	Design a Key-Value Store Solutions available	Apple Google Canva Avalara	Medium
13	Identify the K Most Shared Articles in Various Time Windows (24 hours, 1 hour, 5 minutes) Solutions available	LinkedIn Facebook Twitter	Hard
14	Design Web Crawler Solutions available	Amazon Google Facebook Atlassian	Medium
15	Design Facebook's News Feed Solutions available	Facebook	Medium
16	Design Yelp or Nearby Friends Solutions available	Amazon Facebook Google Uber	Very Hard
17	System to Collect Performance Metrics from Thousands of Servers Solutions available	Google Datadog Amazon eBay	Hard
18	Design Google Calendar Solutions available	Google LinkedIn	Medium
19	Design a Distributed Queue like RabbitMQ Solutions available	Amazon Apple Instacart	Hard
20	Design Google Analytics - User Analytics Dashboard and Pipeline Solutions available	Microsoft Facebook Qualtrics Google	Hard
21	Design a System for Sorting Large Data Sets Solutions available	Google Microsoft	Easy
22	Top K Elements: App Store Rankings, Amazon Bestsellers, etc. Solutions available	Amazon Bloomberg Facebook Pinterest	Easy
23	Design a Job Scheduler Solutions available	Google Amazon Microsoft Doordash	Easy
24	Design a Notification Service at Scale Solutions available	Google Pinterest OCI Stubhub	Hard
25	Surge Pricing System: Uber - Stream Processing, etc. Solutions available	Uber Lyft	Very Hard
26	Netflix: Limit the Number of Screens Each User Can Watch Solutions available	Some FAANG	Hard
27	Design an ETA Service and Location Sharing Between Driver and Rider Solutions available	Uber Some FAANG	Very Hard
28	Design a Hotel Booking System: Room Availability, Reservation, Booking Solutions available	Amazon Square Booking.com	Medium
29	Design an A/B Testing System (like Optimizely) Solutions available	Affirm Some FAANG	Hard
30	Design a Price Alert System for Amazon (or for Stock prices) Solutions available	Facebook Bloomberg Coinbase Swyftx	Easy
31	Design an IoC/Dependency Injection Framework Solutions available	ADP Some FAANG	Very Hard
32	Design a Credit Card Processing System Solutions available	Stripe Paytm Paypal Databricks	Very Hard
33	Count Facebook Likes, Especially for High-Profile Users Solutions available	Facebook Amazon Twitter	Medium
34	Design a Control Plane for a Distributed Database Solutions available	Netflix	Very Hard
35	Design a User Login and Authentication System for a Website Solutions available	Google Visa Gusto	Medium
36	Develop a Weather Application Solutions available	Amazon Chime Facebook Hubspot	Easy
37	Create a Document Management System like Wikipedia, Notion or Google Docs Solutions available	Google Flipkart Notion Amazon	Easy
38	Build a Marketplace Feature for Facebook Solutions available	Facebook Roblox	Easy
39	Design a System to Monitor the Health of a Cluster Solutions available	Uber Lacework Amazon Google	Medium
40	Find a Rider for Uber or Uber Eats Solutions available	Facebook Uber Google Microsoft	Hard
41	Design a Distributed Tracing System Solutions available	Uber Amazon	Very Hard
42	Design Backend for an App to Distribute 6 Million Free Burgers in One Hour Solutions available	Google Deliveroo	Medium
43	Design a File Downloader Library from Frontend to Backend Solutions available	Facebook	Hard
44	Design a System to View Latest Stock Prices Worldwide Solutions available	Google Bloomberg Amazon	Easy
45	Develop a Photo Sharing Platform like Flickr or Google Photos Solutions available	Google Doordash Amazon Uber	Medium
46	Design an On-Call Escalation System Solutions available	Uber	Medium
47	Design and Implement a Wire Transfer API Solutions available	Google Capital One Revolut	Hard
48	Design a Live Comments Feature for Facebook Solutions available	Facebook	Hard
49	Design a Feature to Show the Number of Users Viewing a Page Solutions available	Booking.com	Easy
50	Design Facebook Likes Feature with Live Updates Solutions available	Facebook Coinbase	Easy
51	Create a System to Migrate Large Data to Google Cloud Solutions available	Google OCI	Very Hard
52	Design a Distributed Botnet Solutions available	Facebook Lyft	Hard
53	Create a Distributed File Transfer System like Bittorrent Solutions available	Google Atlassian Twitch	Hard
54	Design a Parts Compatibility Feature for an eCommerce Site Solutions available	Some FAANG	Easy
55	Develop an Ads Management and Display System for a Social Feed Solutions available	Facebook Google Amazon Pinterest	Very Hard