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Prep plan
Updated weekly · Last refresh Sep 22
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Fastly Security Engineer Interview Questions

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

10questions
~1htotal time
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1
Technical FundamentalsStart here. 3 questions · ~24 min
TCP vs UDPEasy

Assesses foundational networking knowledge relevant to security engineering.

FFastly
Security Tooling ChoicesEasy

Evaluates familiarity with security tooling ecosystems and maintenance decisions.

ToolsFFastly
Code Snippet DemonstrationMedium

Assesses coding discipline and secure development practices.

technical experienceFFastly
2
Security & Infrastructure3 questions · ~24 min
Protocol-Specific Security in High TrafficHard

Evaluates approach to secure protocol handling under heavy load and at scale.

NetworkingFFastly
Security Packages and LibrariesMedium

Assesses knowledge of security tooling choices and rationale in a high-performance environment.

FFastly
Describe a Malicious Bot AttackMedium

Evaluates understanding of bot-based threats and defense strategies relevant to Fastly’s edge network.

web securityFFastly

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3
Behavioral & Leadership4 questions · ~32 min
Project Walkthrough and Tech DepthHard

Tests technical judgment, ownership, reflection, and the ability to explain technology trade-offs clearly.

achievementanalytical skillsprojectsFFastly
Advocating a Security RolloutMedium

Tests influence without authority in driving a security initiative through cross-functional resistance while balancing risk reduction and delivery speed.

Influence Without AuthorityStakeholder Managementsecurity advocacyFFastly
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