I applied through a recruiter. The process took 6 weeks. I interviewed at Meta (London, England) in Apr 2025
Interview
Full loop process for Product Data Scientist. 4 core interviews:
- Analytical Execution: stats / probability (eg probability of independent events). I was also asked to calculate a z-score by hand.
- Analytical Reasoning: case study on a product question. Mine was on website tagging for ads.
- Technical Skills: Live SQL coding.
- Behavioural: standard "tell me about a time" questions
Interview questions [1]
Question 1
The one thing I wasn't really prepared for was calculating the z-score by hand. Other probability questions I did fine on, but I just told the interviewer that I wasn't going to be able to remember the formula for calculating the z-score.
The Interview Process is very structured -
First Tech Screening round - 45 mins (usually can extend a bit depending on the interviewer)
- 2 SQL Questions ( Medium to Hard ) - based on Joins
Full Loop - 4 rounds 45 mins each.
- SQL
- Behavioral
- Analytical Execution - stats & prob, A/B testing, case study
- Analytical Reasoning - Case study
Interview questions [1]
Question 1
Questions on Bayes Theorem, Probability distribution, etc.
A friend who worked at Meta recommended I apply, which led to a direct connection with the hiring team. My interview journey included a technical screen focused on product metrics and a behavioral interview. The final round faced me with a practical question about measuring success for a new push notification feature. Funny enough, I had found similar questions in the company-specific prompt section on PracHub, which helped me approach it confidently. Ultimately, I received an offer but decided to decline it for personal reasons.
Interview questions [1]
Question 1
How would you measure the success of a new push notification feature on Instagram? Walk through your primary metric, guardrail metrics, how you'd design the A/B test (randomization unit, sample size, duration), and the tradeoffs between short-term engagement lift and long-term retention impact.
I applied online. The process took 6 months. I interviewed at Meta
Interview
Completed 3 rounds of the process, which includes the initial recruiter screen, technical, full loop, and team matching.
Couldn't move past the full loop interview. The interview was very engaging, and I actually enjoyed working through the cases. No crazy questions.
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