Meta·Data Scientist·Onsite - Product Sense / Strategy
Jun 2026
Meta DS interview centered on a product case about Instagram's account switcher feature. Four questions covering identity detection, experiment interpretation, launch decisions, and user segmentation. Pretty technical for a product analytics round but not impossible.
- How would you go about detecting that multiple Instagram accounts belong to the same real person?
- An experiment on the account switcher shows users are managing more accounts but total time spent in the app hasn't changed. What's going on, and what data would you look at?
- Based on what you know, would you recommend Meta fully launch the account switcher feature?
- Which user segments might actually be unhappy with the account switcher, and why?
“I started with device fingerprinting and IP overlap, which felt obvious, but then got a bit lost on how to weight signals when they conflict.” The rest of the author's notes on Data Scientist interview at Meta, Onsite - Product Sense / Strategy round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.
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