## Interview Prompt Describe a cross-functional project in which you discovered a system performance bottleneck and the team disagreed about the remedy. Explain how you measured the bottleneck, aligned teams with different incentives, made a decision, and verified that the fix improved the system without shifting the problem elsewhere. ### Constraints & Assumptions - Use one concrete bottleneck and identify the affected user or service metric. - Represent the opposing view accurately and distinguish influence from formal authority. - Include before-and-after evidence and any regression guard added. ### Clarifying Questions to Ask - Which team owned the constrained component and which team experienced the impact? - Was the disagreement about diagnosis, priority, or the proposed implementation? - What experiment could distinguish competing hypotheses? ### What a Strong Answer Covers - A measurement-led diagnosis rather than premature optimization. - Cross-functional alignment around shared success and safety metrics. - A fair decision process using experiments, trade-offs, and a named owner. - Verification that latency, throughput, errors, and downstream load moved as intended. ### Follow-up Questions - What if the owning team had no capacity to implement the preferred fix? - Which trade-off did you accept to get the improvement? - How did you keep the issue from recurring?