Top 28
Prep plan
Updated weekly · Last refresh Aug 30

Meta Security Engineer Interview Questions

The questions to prepare for a Meta Security Engineer interview. Questions from real interview reports rank first. Updated weekly.

28questions
~5htotal time
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1
CodingStart here. 3 questions · ~29 min
Secure Token Bucket Rate LimiterHard
Practice

Implement a token bucket rate limiter that safely validates signed requests and enforces per-key limits in O(1) average time.

QueueMathGreedyMeta
Detect Port Scan SourcesHard
Practice

Use parsing, sorting, and a per-IP sliding window to detect source IPs that hit many distinct destination ports quickly.

Hash TablesArraysStringsMeta
Validate IPv4 and IPv6 AddressMedium
Practice

Parse a string and determine whether it is a valid IPv4 address, valid IPv6 address, or neither.

Hash TablesMathStringsMeta
2
Security & Infrastructure11 questions · ~108 min
DDoS Defense for Global CDNHard

Tests your ability to design scalable detection and mitigation for large-scale DDoS threats in Meta-like infrastructure.

InfrastructureNetworkingMeta
Secure Meta Cloud Migration PrioritiesMedium

Rank the top three security priorities for migrating a Meta monolith to cloud, with controls, validation, and launch trade-offs.

InfrastructureMeta
Securing Disappearing PhotosHard

Assesses your approach to threat modeling and controls for sensitive user content in a messaging workflow.

Meta
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3
Behavioral & Leadership13 questions · ~128 min
Finding and Driving a Critical FixEasy

Tests ownership and influence in taking a security bug from discovery through remediation, prioritization, and long-term prevention.

CommunicationOwnershipDealing With AmbiguityMeta
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4
More topics1 question · ~10 min
Design ML-Powered Secret Rotation PrioritizerHard

Design an ML-based centralized secrets management system that ranks risky secrets for rotation at Meta scale under strict latency and reliability limits.

InfrastructureFeature StoreModel ServingMeta
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