Design Amazon Locker (OOD)

Also reported as Storage Locker Design

System DesignAmazonLast reported August 2026Medium Frequency
Reported
5× across candidate reports
First seen
October 2025
Last reported
August 2026
Reported outcome
mixed

Problem Overview

Design Amazon Locker: lockers of several sizes hold packages until customers collect them. What the reports say: - Five candidates name this question, in different round types: an OOD round and a system design round in L5 loops, a coding round in a returning-employee loop (offer), a new-grad round that…

  • The rest of the problem statement — full requirements, constraints, and edge cases
  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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Verified Source
Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.
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Interviewer Follow-ups
The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.
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