Apple·Software Engineer·Onsite - System Design / Architecture
- How would you design a messaging platform?
“Spent the first few minutes just clarifying scope because 'messaging platform' could mean anything from SMS to Slack to iMessage.”
FAANG / Big Tech
Most of these Apple write-ups come from Software Engineers (212), then Machine Learning Engineers (85) and Data Scientists (32). The most reported rounds are the technical phone screen (217), the system design round (48), the product sense round (29) and the behavioral / leadership round (22).
372 interview notes · updated Oct 2026
“Spent the first few minutes just clarifying scope because 'messaging platform' could mean anything from SMS to Slack to iMessage.”
“I jumped straight into logistics and kind of forgot to anchor on the 'why' first.”
“Felt okay about this part.”
“I always stumble on this one.”
“I had a project ready but fumbled the numbers when they pushed on measurable outcomes.”
“This is a monster of a question and I did not pace myself well.”
“I knew the formula conceptually but fumbled the epsilon term placement under the square root.”
“Wasn't expecting this to be the opener.”
“This is where I kind of fell apart.”
“Weird question because the obvious answer is just...”