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Meta interview notes, page 166 of 238

FAANG / Big Tech

Most of these Meta write-ups come from Software Engineers (1,194), then Data Scientists (489) and Product Managers (453). The most reported rounds are the technical phone screen (1,190), the product sense round (466), the system design round (255) and the behavioral / leadership round (205).

2377 interview notes · updated Jul 2026

Meta·Data Scientist·Technical Phone Screen

Jun 2026
Meta Data Scientist interview with a probability/statistics heavy question about ad insertion strategies. Single question but it went pretty deep into distribution math and system risk.
  • Two teams are debating ad insertion strategies: one wants a 4% random replacement rate, the other wants a fixed every-25th-slot approach. Walk through the expected ad count, variance, and probability of hitting more than double the expected load under each method.

“This one is basically a binomial vs deterministic comparison dressed up as a product conflict.”

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Meta·Software Engineer·Onsite - Coding / Algorithms

Jun 2026
Meta SWE coding round, got a classic two-pointer problem on trapping rainwater. Nothing too exotic but it's the kind of question where you either know the pattern or you don't.
  • Given an array of non-negative integers representing bar heights, compute the total amount of water that can be trapped between the bars after rain.

“Two pointers is the move here.”

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Meta·Software Engineer·Hiring Manager Screen

Jun 2026
Interviewed for a product analyst role at Meta. One question, pretty open-ended, and I left feeling like I could've gone deeper on the technical side of things.
  • Walk me through a data project you've worked on and describe the main challenges you ran into.

“I picked a project I knew well but rambled a bit setting up the context instead of getting to the interesting part fast.”

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Meta·Machine Learning Engineer·Technical Phone Screen

Jun 2026
Meta ML Engineer coding round, just the one question about top-K frequent elements. Pretty standard stuff but the follow-up on time complexity tripped me up a bit.
  • Given an integer array and an integer k, return the k most frequent elements in the array.

“Went with a heap-based approach, got the solution working, but fumbled a bit when they pushed on whether I could do it in linear time.”

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Meta·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Meta PM interview with a business case question about declining same-store sales at a supermarket chain. Pretty open-ended and a bit unusual for a tech PM role, but they clearly wanted to see how you connect user needs to product thinking.
  • Same-store sales at a local supermarket chain are declining. As a PM, what products or features would you build to address user needs?

“I spent way too long on the business framing and not enough on actual users.”

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Meta·Software Engineer·Technical Phone Screen

Jun 2026
Meta coding interview with a string comparison problem. Not much context given but the problem itself is pretty classic for a technical screen.
  • Given two strings, list all the differences between them.

“Spent the first few minutes just clarifying what 'differences' meant because it's actually kind of vague.”

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Meta·Data Scientist·Technical Phone Screen

Jun 2026
Meta data scientist round with a string template expansion problem. Interesting problem but the edge cases around cycles and missing keys are where things get tricky, and I don't think I handled them as cleanly as I could have.
  • You have a dictionary mapping string keys to template values, where templates can contain placeholders referencing other keys. Given an input string with placeholders, return the fully expanded string. How do you handle nested references, missing keys, and cycles like A referencing B which references A?

“The base case is easy enough, just do a find-and-replace pass.”

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Meta·Product Manager·Onsite - Product Sense / Strategy

Jun 2026
Meta PM interview, product design round. One question about building a marketplace-style feature inside Facebook. Not the most intense session I've had but it required more structure than I initially gave it.
  • How would you design a Facebook product that connects users with local handymen or home service providers?

“I jumped straight into features and the interviewer kind of just waited for me to finish before asking who I was building this for.”

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Meta·Software Engineer·Technical Phone Screen

Jun 2026
Meta coding interview with a grid traversal problem. Not a lot of context to go on but the problem itself is a classic shortest path type question.
  • Given a 2D grid of cells, find the shortest path between two specified cells.

“BFS is the move here, pretty standard once you recognize it.”

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Meta·Software Engineer·Onsite - Behavioral / Leadership

Jun 2026
Behavioral round at Meta for a data analyst role. Just one question but it required a pretty specific story about influencing upward with data, which I was not totally prepared for.
  • Describe a situation where you used data analysis to convince senior leadership to reverse or change a decision they had already committed to.

“I had a story ready but it was kind of weak in hindsight.”

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