Meta·Software Engineer·Onsite - System Design / Architecture
- Design Instagram.
“Broad enough to go in a dozen directions and that's kind of the problem.”
FAANG / Big Tech
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2377 interview notes · updated Jul 2026
“Broad enough to go in a dozen directions and that's kind of the problem.”
“The first four parts are basically public knowledge at this point if you've been lurking the usual prep forums.”
“I started with proxy signals from the existing data, things like how often 1:1 calls happen in group chat contexts, whether people make back-to-back calls to the same set of contacts within a short window, that kind of thing.”
“I started okay, talked about user research and engagement signals, but then I got stuck on how to actually prioritize which new reactions to add versus whether to add any at all.”
“This question is basically five questions dressed up as one.”
“This sounds like one question but it's really five questions stitched together, and they will probe each layer separately once you finish your opening.”
“The part that got me was treating the stopping point correctly.”
“Classic problem but I still fumbled the edge case where prices only go down.”
“I had a story ready but halfway through I realized it wasn't that impressive from a business impact angle.”
“Straightforward enough.”