Tell me about an engineer you significantly helped grow. What was your specific role in their development, and what changed for them?
Behavioral rounds at FAANG and AI labs now include 1-2 design follow-ups. Each answer below ships with both.
The situation, your role, and the stakes, compressed.
A mid-level engineer on my team, call her A, was strong technically but stuck at the same level for two cycles. The pattern across her packets: solid execution on assigned work, no examples of scoping or driving anything ambiguous, minimal cross-team visibility. Her manager and I both suspected she was being held back by a self-reinforcing loop: clean tickets in, no scope demonstrated, so she kept getting clean tickets.
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Design Follow-Ups
The new behavioral roundBehavioral rounds increasingly drop into 1-2 technical follow-ups that probe whether you could actually build the system you described. These are the design questions a real interviewer would ask after this STAR answer.
Design the model evaluation harness A built. What's the API surface, how does it handle the 4 different team schemas, and how does it scale?
How would you architect a self-improving harness, where the predictions-vs-production-performance feedback loop makes the evaluation itself better over time?