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Coding · 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: Crusoe, Addepar, Airbnb, Airwallex +22
System Design
Last reported Oct 2026
Populate each node's next pointer to point to its immediate right neighbor on the same level (or NULL if none) in a binary tree that…
Companies: Crusoe, Meta
Last reported Oct 2026
Design a system to calculate the total cost of resource usage across a list of time intervals, given a default price per unit time and…
Companies: Crusoe
Last reported Mar 2026