LinkedIn Data Scientist interview typically runs 1+ rounds: technical screen with case-based ML and experiment design questions. The process can end at the screen stage and is distinguished by its emphasis on feed ranking and marketplace-aware metric design.
$120K
Avg. Base Comp
$203K
Avg. Total Comp
1+
Typical Rounds
1-2 weeks
Process Length
What stands out most from LinkedIn data science interviews is how quickly the conversation moves from a surface-level metric to the full ecosystem of the product. The one detailed experience we have on record is a perfect illustration: a candidate was asked about optimizing dwell time in feed ranking, and the feedback wasn't that they got the statistics wrong — it was that they anchored too narrowly on the prompt's framing. LinkedIn interviewers want you to zoom out and ask what else could break. Paid posts, organic content, job listings, connection suggestions — the feed is a marketplace with competing objectives, and they expect you to hold that complexity in your head from the start.
The experiment design component is particularly demanding here. User-level versus session-level randomization isn't a throwaway detail — it was a central point of the discussion, and getting it wrong signals a gap in causal thinking. The delayed guardrail problem is equally telling: metrics like connection requests can take weeks to materialize, and LinkedIn interviewers want to hear you reason through whether to extend the test window or find a proxy. These are real tradeoffs their teams face, and the interview is essentially a simulation of a product review meeting.
The question bank also reveals something important: LinkedIn leans heavily on their own product domain. Job recommendations, declining applicants, repeat postings, network experiment design — these aren't generic ML questions. Candidates who walk in having thought carefully about how LinkedIn's marketplace actually works, the tension between engagement and meaningful interaction, will have a meaningful edge over those treating it as a generic data science screen.
Synthetized from 1 candidates reports by our editorial team.
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Real interview reports from people who went through the Linkedin process.
I was working through a LinkedIn feed ranking case where the goal was to increase dwell time per session, but there was a real concern that changing the ranking model could hurt meaningful interactions, comments, connection requests, and retention. The discussion was about how to define the success metric and how to design the experiment so you do not get fooled by spillover.
We started with the main objective, which was dwell time, and then moved to guardrails like comments, connection requests, and user retention. The coach also brought up negative signals, like people hiding posts, unfollowing, or reporting content, which I had not fully centered at first. We talked about user-level randomization versus session-level randomization, and the coach pointed out that user-level makes more sense because session-level can create spillover and contamination. Another thing that came up was that some of the guardrails, especially connection requests, are delayed and may take weeks or months to show up, so you either need to run the test longer or use proxy metrics.
The coach also said I should mention a power calculation and think about how many users to expose to the treatment. After the main discussion, the feedback was that I had gotten tunnel vision on the metrics the prompt gave me, and I should have zoomed out more to the full feed context, including paid posts, friends' posts, jobs, and the broader marketplace dynamics.
Prep tip from this candidate
Do not tunnel vision on dwell time. Call out the feed's broader ecosystem, then name negative signals and delayed guardrails, because those were the details the coach wanted to hear.
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Sourced from candidate reports and verified by our team.
Topics based on recent interview experiences.
Featured question at Linkedin
Given two sorted lists, write a function to merge them into one sorted list.
| Question | |
|---|---|
| User Experience Percentage | |
| 500 Cards | |
| Month Over Month | |
| Over-Budget Projects | |
| Raining in Seattle | |
| Repeat Job Postings | |
| Job Recommendation | |
| Network Experiment Design | |
| Bagging vs Boosting | |
| Delivery Estimate Model | |
| Rejection Reason | |
| Integer to Roman | |
| The Brackets Problem | |
| Nearest Common Ancestor | |
| Declining Applicants | |
| String Mapping | |
| Find Duplicate Numbers in a List | |
| Hurdles In Data Projects | |
| Reservoir Sampling Stream | |
| Target Indices | |
| Lasso vs Ridge | |
| Recruiting Leads | |
| Biased Random Number Generator | |
| Testing Price Increase | |
| Job Training Program Evaluation | |
| Type I and II Errors | |
| Target Value Search | |
| Merge N Sorted Lists | |
| Unbiased Estimator |
Synthesized from candidate reports. Individual experiences may vary.
A technical interview focused on product metrics, experimentation design, and case-based problem solving. Candidates are given a scenario such as feed ranking optimization and are expected to define success metrics, identify guardrail metrics, discuss randomization strategies, and address issues like spillover and power calculations.