Design AI Product Feature with Streaming, Rate Limiting, and Cost Control

System DesignOpenAILast reported August 2026Low Frequency
Reported
1× across candidate reports
First seen
August 2026
Last reported
August 2026
Reported outcome
unknown

Problem Overview

Design a high-scale AI product feature serving a large number of concurrent users with real-time/streaming responses (e.g., similar to ChatGPT-style interaction). The design must address: (1) API design with streaming responses using SSE or WebSockets; (2) request rate limiting, queuing, and throttling especially when interacting with upstream LLM APIs; (3)…

  • 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
Unlock the full OpenAI catalog
Full problem statements, candidate-reported follow-ups, and walkthroughs — for every OpenAI question.
Unlock with Pro
Already a member? Sign in
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.
Is this helpful?