← Openai Interview Insights

Openai·Software Engineer·Technical Phone Screen·Senior

Senior
Apr 2026

Summary

Data science interview at OpenAI, one of those analytical rounds where they throw a messy scenario at you and want to see how you think under pressure.

Questions Asked (1)

Q1

You're looking at an experiment where different metrics moved in opposite directions. How do you make sense of that and decide what to do next?

A/B Testing & ExperimentationProduct Analytics & MetricsAdaptability & Ambiguity
Author's notes

This tripped me up more than I expected.

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AI HintsAI Generated

Suggested Approach

Start by acknowledging that conflicting metrics are common and require a structured approach. Then walk through a framework that prioritizes understanding the 'why' behind the divergence, evaluating trade-offs, and making a decision aligned with long-term goals. Emphasize the importance of not rushing to conclusions and considering both statistical and practical significance.

Pro tip: Show that you can balance data with product intuition and business context—interviewers at OpenAI value engineers who can think beyond the numbers and consider user experience and long-term impact.

1. Validate the data and experiment

Check for data quality issues, sample ratio mismatch, or instrumentation bugs that could cause spurious results. Ensure the experiment was run correctly and metrics are defined consistently.

2. Understand the metrics and their relationships

Identify which metrics moved and in what direction. Determine if they are leading vs. lagging indicators, or if they measure different aspects of user behavior (e.g., engagement vs. revenue).

3. Segment and dig deeper

Break down the results by user segments, cohorts, or time to see if the divergence is driven by a specific group. Look for interactions or confounding factors.

4. Assess trade-offs and business impact

Quantify the magnitude of each metric change and weigh them against strategic priorities. Consider both short-term and long-term consequences, and whether the negative movement is acceptable.

5. Decide and iterate

Make a decision: ship, kill, or iterate. If uncertain, propose follow-up experiments or deeper analysis. Communicate the rationale clearly to stakeholders.

Key Points to Mention

  • Statistical significance and practical significance
  • Leading vs. lagging indicators
  • Segment analysis to uncover heterogeneous treatment effects
  • Trade-offs between short-term and long-term goals
  • Guardrail metrics and overall evaluation criteria (OEC)
  • Iterative experimentation and learning from ambiguous results

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.