Tell me about a time you received difficult feedback that changed how you approach your work.
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.
Six months into building an autonomous LLM RL pipeline (open-source LLM + LoRA + PPO + an LLM-as-judge reward model), my director told me in a 1:1 that while my technical results were exceptional, with quality scores in the high 80s and ~3× better query precision, I was operating too much as an IC. His exact line: 'You're building brilliant systems, but you're not building the team that will scale these systems.' For a staff role, this was a blocker.
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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 framework you refactored from the IDE extension. What's the public API surface, and how do other teams extend it without forking?
You started tracking 'engineers who shipped ML features independently' as a personal metric. Design that tracking system without it becoming a Goodhart trap.