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LinkedIn·Data Scientist·Onsite - Product Sense / Strategy·Senior

SeniorPrefer not to say
Jul 2026Remote

Summary

Product data science interview at LinkedIn with two meaty product sense questions. Nothing behavioral, just pure case work. The kind of interview where you either have a framework in your head or you're winging it.

Questions Asked (2)

Q1

LinkedIn sees a material drop in weekly traffic from the Home Page to the Profile Page. How would you investigate whether this is a product bug, a logging issue, a user behavior shift, or an intentional improvement?

Root Cause AnalysisProduct Analytics & MetricsProduct Sense & Ideation
Author's notes

The inline profile preview context is what makes this question interesting rather than generic.

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AI HintsAI Generated

Suggested Approach

Start by validating the data and ruling out instrumentation issues, then segment the drop by dimensions like platform, user cohort, and time to isolate the cause. Finally, assess whether the drop aligns with an intentional product change or reflects a genuine shift in user behavior.

Pro tip: Always check for logging or tracking changes first—many apparent metric drops are due to instrumentation issues, not actual user behavior. Also, consider that a drop might be an intentional trade-off from a product change that improved another metric.

1. Validate the Data

Verify the drop is real by checking data pipelines, logging, and metric definitions. Ensure there are no recent changes to tracking code or ETL processes that could cause artificial drops.

2. Segment and Localize

Break down the drop by dimensions such as platform (iOS, Android, web), user demographics, geography, and time. Identify if the drop is uniform or concentrated in specific segments.

3. Check for Product Changes

Review recent product releases, A/B tests, or feature launches that might affect navigation from Home to Profile. Determine if the drop is an intentional improvement (e.g., redesigned Home Page reducing profile visits).

4. Analyze User Behavior

Investigate if the drop reflects a shift in user behavior, such as increased engagement with other features or changes in user cohorts. Use funnel analysis and cohort analysis to understand behavioral changes.

5. Synthesize and Recommend

Combine findings to determine the most likely cause and propose next steps, such as fixing a bug, adjusting logging, or accepting the change as an improvement. Communicate with stakeholders.

Key Points to Mention

  • Data validation: check for logging errors, pipeline issues, and metric definition changes.
  • Segmentation: analyze by platform, user cohort, geography, and time to localize the drop.
  • Product changes: review recent releases, A/B tests, and intentional design changes.
  • User behavior: use funnel analysis, cohort analysis, and session recordings to understand shifts.
  • Statistical significance: ensure the drop is not due to random variation.
  • Cross-functional collaboration: work with engineering, product, and data engineering teams.

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

Q2

Design an experiment and success measurement framework for changing LinkedIn's Home Feed default from showing all content to showing only the most relevant content per viewer.

A/B Testing & ExperimentationProduct Analytics & MetricsProduct Strategy
Author's notes

This one has a real tension baked in that I liked: better viewer engagement vs.

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AI HintsAI Generated

Suggested Approach

Start by clarifying the product goal and defining a clear hypothesis about how relevance-based ranking will affect user engagement and satisfaction. Then outline a randomized controlled experiment with guardrail metrics, and propose a measurement framework that includes both short-term and long-term success metrics. Finally, discuss how to analyze results, including segmentation and potential pitfalls.

Pro tip: Emphasize the importance of defining 'relevance' precisely and ensuring the experiment accounts for network effects and content diversity to avoid filter bubbles. Also, mention the need for a holdback group to measure long-term effects.

1. Define Hypothesis and Goals

Articulate a clear hypothesis: showing only the most relevant content will increase user engagement and satisfaction. Define primary success metrics (e.g., daily active users, time spent, meaningful interactions) and guardrail metrics (e.g., content diversity, user-reported satisfaction).

2. Design the Experiment

Propose a randomized controlled trial (A/B test) where users are randomly assigned to either the control (current feed) or treatment (relevance-based feed). Ensure proper randomization, sample size calculation, and consider stratification by user activity level or demographics.

3. Select Metrics and Measurement

Choose a combination of engagement metrics (clicks, likes, comments, shares), satisfaction metrics (surveys, sentiment), and long-term metrics (retention, churn). Include guardrail metrics to monitor unintended consequences like reduced content diversity or increased polarization.

4. Analyze and Interpret Results

Plan for statistical analysis (e.g., t-tests, regression) to compare treatment and control. Consider segment analysis to see heterogeneous effects. Evaluate both statistical significance and practical significance, and check for novelty effects.

5. Decide and Iterate

Based on results, decide whether to roll out, iterate, or abandon the change. If successful, plan for gradual rollout and continued monitoring. If not, analyze why and consider alternative relevance algorithms.

Key Points to Mention

  • Randomization and control group setup
  • Definition of 'relevance' and how it's operationalized
  • Primary and guardrail metrics (e.g., engagement, satisfaction, diversity)
  • Sample size and power analysis
  • Segmentation and heterogeneous treatment effects
  • Long-term effects and novelty bias

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