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32 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · ML system design · System design
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Design a real-time messaging system like WhatsApp or Facebook Messenger that supports 1:1 and group conversations, message delivery status tracking, user presence features…
Companies: Lyft, Addepar, Airbnb, Airwallex +22
System Design
Last reported Nov 2026
Design a distributed web crawler system that can crawl and store Wikipedia pages at scale using multiple machines or edge devices, with focus on coordination…
Companies: Lyft, Glean, Google, Meta
Last reported Nov 2026
Companies: Lyft
ML System Design
Last reported Oct 2026
Companies: Lyft
System Design
Last reported Oct 2026
Design a short-term (24-48 hour) donations website where users can contribute to pre-selected charities, with focus on payment processing, failure handling, and backup payment…
Companies: Lyft, DoorDash, Whatnot
Last reported Oct 2026
Companies: Lyft
System Design · System Design Fundamentals
Last reported Sep 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
Find the smallest substring of s that contains all characters of t (including duplicates), or return "" if none exists. This is typically solved with…
Companies: Lyft, Amazon, LinkedIn, Meta +2
Hash Table · Sliding Window · String
Last reported Aug 2026
Design an online programming judge system for coding competitions where users can submit solutions to algorithmic problems, get real-time feedback on code execution, and…
Companies: Lyft, Amazon, LinkedIn, Meta +4
Last reported Jul 2026
Design a time-based key-value store that records multiple values per key with timestamps and returns the value whose timestamp is the largest <= the queried…
Companies: Lyft, Amazon, Anthropic, Apple +8
Binary Search · Design · Hash Table · String
Last reported Jul 2026
Design an in-memory database system that can efficiently handle transactions. Consider aspects such as data storage, transaction management, and concurrency control.
Companies: Lyft, Anchorage Digital, Coinbase, Uber
Last reported Jul 2026
Find the smallest positive integer missing from an unsorted array while meeting O(n) time and O(1) extra space. The classic approach uses in-place index-based placement…
Companies: Lyft
Last reported May 2026
Companies: Lyft
Last reported May 2026
Companies: Lyft, Google, Robinhood, Roblox
Last reported May 2026
Companies: Lyft, Amazon, Automata, Datadog +6
Last reported May 2026
Companies: Lyft, Meta, Oracle
Last reported Apr 2026
Companies: Lyft, Meta, Microsoft
Last reported Apr 2026
Companies: Lyft, Adyen, Amazon, Anthropic +37
Last reported Apr 2026
Design a distributed job scheduler that can handle high-throughput job processing (10,000+ jobs per second), support both scheduled (cron-based) and ad-hoc job execution…
Companies: Lyft, Airbnb, Apple, Autodesk +25
System Design
Last reported Apr 2026
Photo delivery and social feeds: safe publication, celebrity fan-out, stable pagination, and high-volume interactions.
Companies: Lyft, Amazon, Bloomberg, Datadog +9
content-delivery · feed-fanout · idempotency · media-storage
Last reported Feb 2026
Design a social media feed system that generates and populates personalized feeds for users on platforms like Twitter, Instagram, or Facebook.
Companies: Lyft, Amazon, Apple, Atlassian +5
Last reported Feb 2026
Companies: Lyft
Last reported Aug 2025
Companies: Lyft, Adyen, Airbnb, Amazon +31
Last reported Jul 2025
Given a digit string, count how many ways it can be segmented into valid codes 1–26 (two-digit codes cannot start with '0'), handling invalid zeros…
Companies: Lyft, Anduril, Meta
Dynamic Programming · String
Large command fan-out with durable offline delivery, bounded execution, and honest handling of uncertain outcomes.
Companies: Lyft, Meta
agent-architecture · backpressure · durable-workflows · failure-detection