Interview questions
Find a company or topic. Read the sources, then practice.
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Find a company or topic. Read the sources, then practice.
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Showing 476–500
Companies: OpenAI
Distributed Transactions & Idempotency · Payments & Ledgers · System Design
Last reported Aug 2026
Design a voting system that allows users to vote on products, enabling the most popular products to qualify for a deal of the day feature.
Companies: Lyft
Last reported Aug 2026
Companies: Airbnb
System Design
Last reported Aug 2026
Companies: Brex
System Design
Last reported Aug 2026
Design a stock brokerage system that allows users to place and manage limit orders, supporting order validation, order lifecycle tracking, and reliable order submission to…
Companies: OpenAI, Robinhood
Last reported Aug 2026
Design a system that allows operators to filter and select batches of tasks for automated quality review, processing them through an external LLM to evaluate…
Companies: Netflix, Scale AI
Last reported Aug 2026
Design a partner API extension for a ticketing platform that allows users who purchased tickets on the platform to resell them on third-party sites, including…
Companies: Seatgeek
Last reported Aug 2026
Design a system for managing transactions and generating invoices for multiple small businesses, allowing users to ingest transactions, generate invoices from previously…
Companies: Atlassian
Last reported Aug 2026
Design an analytics dashboard system for an AI chat application similar to ChatGPT that allows Product, Engineering, and Support teams to monitor system health, user…
Companies: Airbnb, Anthropic, Salesforce
Last reported Aug 2026
Design an online auction platform that allows users to list items for bidding, place bids in real-time, and manage the end-to-end buying and selling process…
Companies: Meta, Tesla
Last reported Aug 2026
Companies: Plaid
System Design
Last reported Aug 2026
Companies: Sierra
Real-Time Systems · System Design
Last reported Aug 2026
Design a real-time status search system that handles billions of users posting status updates daily, with support for keyword searches using boolean AND/OR operations without…
Companies: Meta
Last reported Aug 2026
Design a ride-sharing service like Uber that allows users to request rides, matches them with nearby drivers, handles real-time tracking, and processes payments.
Companies: Airbnb, Amazon, Google, Liveramp +5
Last reported Aug 2026
Design a billing system that allows businesses to manage customer invoices, process payments, handle recurring subscriptions, and track payment history.
Companies: Moveworks
Last reported Jul 2026
Design a cloud billing system similar to AWS that can handle billing and cost management for different cloud services like EC2, Lambda, and S3. The…
Companies: Moveworks, Twilio
Last reported Jul 2026
Design a flight search system that aggregates real-time pricing data from multiple third-party vendors, where vendor APIs are metered and each API call incurs a…
Companies: Agoda
Last reported Jul 2026
Design a system that notifies customers when their fleet vehicles enter or exit predefined geographical boundaries (geofences), using real-time GPS data from vehicle gateways.
Companies: Samsara
Last reported Jul 2026
Design a healthcare monitoring system that allows users to track their health vitals end-to-end, perform analysis on the collected data, and provide meaningful insights into…
Companies: Amazon
Last reported Jul 2026
Design a system that allows food delivery consumers to add reviews on ordered food items and earn monetary rewards based on the quality of their…
Companies: DoorDash, LinkedIn
Last reported Jul 2026
Design a system that can rollout new versions of services to cameras and other devices deployed worldwide. The system should handle version management, deployment scheduling…
Companies: Axon, Coursera
Last reported Jul 2026
Design a travel insurance system that allows users to sign up for coverage that automatically activates when they travel, including features like policy management, trip…
Companies: Revolut
Last reported Jul 2026
Design a VM scheduling and management platform that supports a pool of 100k VMs and allows services to request VM sets with low-latency assignment (in…
Companies: Databricks, Snowflake
Last reported Jul 2026
Design a system that allows companies to set budgets for ad campaigns across different regions, charges based on user clicks, and manages budget allocation when…
Companies: Databricks
Last reported Jul 2026
Shared stock across warehouses and sales channels: concurrent reservations, reservation expiry, and correct stock counts.
Companies: Amazon, Blue Origin
all-or-nothing-carts · concurrency · hot-keys · inventory-allocation
Last reported Jul 2026