cleared the Meta loop in May 2026. E4-E5 boundary mobile role. here's what i'd do differently if i had to prep from zero, based on what actually mattered.
What i spent too much time on:
Leetcode hard. i did probably 40 hards. maybe 2 showed up in modified form. Meta coding rounds in my experience skew medium-difficulty with a demand for clean code and communication, not brute-force hard grinding. i'd have done 20 hards and used the rest of the time on medium variety and system design.
also: reading vague blog posts about "Meta culture." not useful. talk to actual current or recent employees instead.
What i under-prepared:
JEDI rounds. this is Meta-specific and it matters a lot. these are behavioral questions but evaluated pretty rigorously against specific leadership principles. the question "tell me about a time you moved fast and shipped something" is easy to fumble if you don't have a concrete, tight story ready. i'd spend at minimum 20% of total prep time on JEDI stories. ideally 30%.
System design breadth. i knew how to go deep but not how to sketch fast. meta interviewers want you to do a broad walk first, then go where they direct you. practice doing 5-minute skeleton sketches of systems before diving in.
What actually helped: Doing 2-3 mock interviews with someone who'd been through the Meta loop (not just any big tech loop) Timing my coding solutions out loud, including the talk-through. what feels slow in your head sounds slower in an interview. For mobile role specifically: they did ask mobile-aware system design questions. knowing tradeoffs between background sync approaches, battery vs freshness, push delivery quirks. that was more platform-specific than i expected.
Total prep time: about 6 weeks, 1-2 hours per day. felt about right.