Behavioral Prompt: Most Significant Professional Achievement (Last 3 Years)

Context: Technical screen for a Data Scientist role. The interviewer is assessing your ability to drive measurable impact, make sound decisions under constraints, and reason about trade-offs and risk.

Answer the following in a concise, evidence-based narrative:

1. Context
   • What was the business problem and why did it matter?
   • Your role and stakeholders.
2. Specific, measurable target(s)
   • Quantify goals (e.g., reduce loss by 20%, improve conversion by 5 pp, hit p95 latency < 20 ms).
3. Constraints
   • Time, budget, headcount, data/tech/compliance limits.
4. Key decisions
   • Options considered, rationale, and trade study (e.g., model choice, thresholding, experiment design).
5. Biggest risk and mitigation
   • What could have failed? How did you de-risk it?
6. How you measured success
   • Experiment/holdout design, primary metric(s), guardrails.
7. Exact before/after metrics
   • Baseline vs. outcome with units and time window.
8. Trade-offs you accepted knowingly
   • What you sacrificed and why (e.g., latency vs. accuracy, recall vs. FPR, speed vs. scope).
9. What you reused later
   • Artifacts, patterns, or components you leveraged in another project.

Guidance: Keep it 2–3 minutes. Use concrete numbers. Anonymize sensitive details if needed.