Meta Mobile Engineer Interview Questions

4100+ verified questions, indexed by team and level. Real questions submitted by candidates who completed Meta loops in the last 24 months.

About the Meta Mobile Engineer hiring loop

Meta's loop is two product-coding rounds, a system design (E5+), and two behavioural rounds against Meta's five values. Questions are filtered to role and indexed by org (Instagram, WhatsApp, Messenger, Reality Labs, core Meta, Ads).

Mobile rounds score on platform-native fluency, offline-first architecture, performance awareness, and security posture. iOS vs Android role-specific depth is expected; cross-platform breadth is a plus.

Topics covered in Meta Mobile Engineer interviews

  • 01iOS internals (Swift / Objective-C, ARC, GCD, SwiftUI vs UIKit, Core Data)
  • 02Android internals (Kotlin / Java, Coroutines, Jetpack Compose, Room, WorkManager)
  • 03Cross-platform (React Native, Flutter — when to pick vs native)
  • 04Mobile system design (offline-first, sync conflict resolution, push, background tasks)
  • 05App performance (cold-start time, frame rendering, battery, memory)
  • 06Mobile security (keychain / keystore, certificate pinning, jailbreak detection)

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