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Meta interview notes, page 66 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·Software Engineer·Technical Phone Screen

May 2026
Meta SWE coding round, one algorithmic question about finding a unique element in an array with a constraint on extra space. Pretty lean session, just the one problem but the follow-up on space complexity is where things get interesting.
  • Given an array where all elements appear more than once except one, find the unique element using minimal extra space.

“My first instinct was a hash map and I almost said it out loud before catching myself.”

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Meta·Data Scientist·Technical Phone Screen

May 2026
Data Scientist interview at Meta focused entirely on Stories as a product case. Four questions, all interconnected, building from basic evaluation metrics up to cross-app performance gaps. The experiment design question at the end was the toughest part.
  • How would you evaluate the performance of Instagram Stories as a feature?
  • What criteria would you use to decide whether to do a full launch after a pilot?
  • If Stories are cannibalising Feed posts, how do you respond to that?
  • Facebook Stories gets roughly half the views of Instagram Stories. Why might that be, and how would you design an experiment to investigate it?

“Started with DAU lift and posting frequency, which felt safe.”

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Meta·Software Engineer·Technical Phone Screen

May 2026
Meta SWE interview with a build-a-calculator prompt. Short on details but it's a classic coding screen.
  • Build a calculator.

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Meta·Software Engineer·Online Assessment (OA)

May 2026
Did a coding screen for a SWE role at Meta. Single problem, pretty straightforward string manipulation. Nothing that'll keep you up at night.
  • Given a string of English letters, return the absolute difference between the count of uppercase and lowercase letters.

“Pretty basic.”

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Meta·Product Manager·Onsite - Product Sense / Strategy

May 2026
PM interview at Meta for a health team role. One product design question, pretty open-ended, the kind where you can go a lot of directions and that's both the fun and the problem.
  • You're a PM on Meta's health team. Design a product for tissue donation.

“I spent the first minute just staring at the ceiling in my head.”

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Meta·Product Manager·Onsite - Product Sense / Strategy

May 2026
Meta PM interview, one question about defining success and setting goals for an events product. Pretty open-ended, which I wasn't fully prepared for.
  • You're the PM for an events product (not necessarily Facebook Events). How do you define success and set goals for it?

“The 'not necessarily Facebook Events' part threw me a bit.”

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Meta·Data Scientist·Onsite - Coding / Algorithms

May 2026
Meta onsite for a Data Scientist role, SQL-heavy session using an Oculus dataset. One question but it had a real edge case baked in that made it less trivial than it looked.
  • Given a table of daily user scores, write a SQL query that returns exactly the top 10 users by score. What happens when the users at positions 10 and 11 have the same score, and how does your query handle that?

“I jumped straight to ROW_NUMBER and felt pretty good about it until they asked what happens at the boundary.”

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Meta·Software Engineer·Onsite - Behavioral / Leadership

May 2026
Behavioral round at Meta for an EM role. Just one question but it hit hard, the kind where you think you have a good answer until you're actually in it.
  • Tell me about a time when you failed as a people manager.

“I had a story ready but it came out too polished, like I'd already resolved everything and learned the lesson and moved on.”

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Meta·Product Manager·Onsite - Behavioral / Leadership

May 2026
Meta PM interview, one question about a product launch you led. Pretty standard behavioral territory but the follow-up depth they expect can catch you off guard.
  • Walk me through a product you launched successfully.

“Went in thinking this was a softball.”

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Meta·Product Manager·Onsite - Product Sense / Strategy

May 2026
PM interview at Meta with a product sense question about improving a third-party app's seller experience. Pretty open-ended, not much context given upfront.
  • How would you improve the seller drop-off experience on the GOAT app?

“This one tripped me up a bit because GOAT isn't a Meta product, so I spent maybe too long trying to figure out if there was a trick to it.”

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