Your question is Owning a Complex Feature End-to-End. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe a complex feature you owned end-to-end; what were the biggest challenges and how did you resolve them?
Choose a feature where you personally drove execution from definition through delivery and post-launch follow-up. Explain the stakeholders, constraints, trade-offs, risks, decisions, and results, making clear what you owned and how you collaborated with others.