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Multi-Device Streaming Pipeline with GDPR Deletion

A hard Pipeline Design mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
Pipeline Design
Difficulty
hard
Seniority
staff

Interview Prompt

Our platform has listeners on mobile, web, and smart speakers - all generating user interaction events. We need to aggregate these into dashboards showing hourly and daily engagement metrics. The challenge is that events arrive late, users can listen across multiple devices in one session, and GDPR requires us to completely delete a user's event history within 30 days of a deletion request. Design the end-to-end pipeline.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your pipeline design solution with real code execution
  4. Get instant feedback and a hire/no-hire decision