System Design Doc Review

System DesignAnthropicLast reported April 2026Low Frequency
Reported
3× across candidate reports
First seen
April 2026
Last reported
April 2026
Also asked in
Phone Screen
Reported outcome
mixed

Problem Overview

A newer Anthropic onsite round (first observed April 2026) in which the candidate is given a pre-written system design document and asked to review and critique it. Rather than designing a system from scratch, the candidate must read an existing design doc and identify weaknesses, gaps, trade-offs, or improvements. Exact…

  • 4 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.
Codex Fact-Checked
Technical claims, formulas, and scale numbers are reviewed against primary sources.
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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