Merchant Clustering with Expiring Attributes

OAStripeLast reported September 2025Low Frequency
Reported
1× across candidate reports
First seen
September 2025
Last reported
September 2025
Reported outcome
unknown

Problem Overview

Given a set of entities/merchants, each with shared attributes, group them into clusters where two entities belong to the same cluster if they share at least one attribute. Attributes have a duration and expire after a certain number of days, so clusters must be recomputed as the day advances and…

  • 3 candidate-reported follow-ups — the exact probes interviewers asked, with the trigger for each
  • 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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