Mock Interview: Staff System Design

The question: Design a platform that deletes a user's data across all of the marketplace's services when the user closes their account.

That sentence is the whole question, exactly as the interviewer gives it. It contains no numbers, no list of services, and no description of what exists today. The missing information is part of the test.

The transcript below is a 60-minute answer at Staff level, divided into six parts, with commentary after each part. The architecture stays small on purpose