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Meta·Technical Product Manager·Technical Phone Screen·Senior

Senior
Jun 2026

Summary

TPM interview at Meta with a metrics design question for a voting system. Short and focused, but don't let the simplicity fool you.

Questions Asked (1)

Q1

What metrics would you use to measure the health and success of a voting system?

Product Analytics & MetricsSystem DesignProduct Sense & Ideation
Author's notes

I went straight to engagement numbers and kind of forgot about integrity metrics entirely for the first few minutes.

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AI HintsAI Generated

Suggested Approach

Start by clarifying the scope of the voting system (e.g., platform feature, poll, or election) and the primary goal (e.g., integrity, engagement, or accuracy). Then, structure your answer around key metric categories: integrity, participation, user experience, and system performance, ensuring alignment with Meta's scale and product values.

Pro tip: Emphasize the trade-off between security and participation—overly strict measures can suppress engagement, while lax measures risk integrity. Show you understand Meta's unique challenges with misinformation and diverse global user bases.

1. Clarify the context and goals

Ask clarifying questions to understand the type of voting system (e.g., social poll, content moderation vote, or election) and its primary objectives (e.g., accuracy, engagement, trust).

2. Define success criteria

Identify what success means for this system: Is it high participation, accurate results, user trust, or low fraud? This shapes which metrics matter most.

3. Categorize metrics

Group metrics into categories such as integrity (e.g., fraud rate, duplicate votes), participation (e.g., turnout, completion rate), user experience (e.g., ease of voting, satisfaction), and system performance (e.g., latency, uptime).

4. Select key metrics per category

Choose 1-2 specific, measurable metrics for each category, ensuring they are actionable and aligned with goals. For example, integrity: % of votes flagged as fraudulent; participation: daily active voters.

5. Prioritize and discuss trade-offs

Explain how you would prioritize metrics based on the system's stage and goals, and acknowledge trade-offs (e.g., stricter verification may reduce participation).

Key Points to Mention

  • Integrity metrics: fraud detection rate, duplicate vote rate, audit accuracy
  • Participation metrics: voter turnout, completion rate, time to vote
  • User experience metrics: ease of voting (SUS score), user satisfaction, error rate
  • System performance metrics: latency, uptime, scalability under load
  • Trust and transparency: user confidence surveys, auditability, public verifiability
  • Trade-offs: security vs. accessibility, speed vs. accuracy, scale vs. personalization

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.