Top 21
Prep plan
Updated weekly · Last refresh Aug 30

CertiK Security Engineer Interview Questions

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

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1
CodingStart here. 7 questions · ~56 min
Detect Reentrancy in Smart ContractsHard

Tests ability to reason about reentrancy patterns and implement vulnerability detection logic.

RecursionHash TablesGraphsCertiK
Blockchain Data Structure EfficiencyMedium

Tests algorithmic thinking and ability to optimize data structures for blockchain constraints.

Hash TablesTreesGraphsCertiK
Analyze a Flagged Smart ContractMedium

Tests structured vulnerability triage, investigation workflow, and evidence-based conclusions.

RecursionHash TablesGraphsCertiK
Smart Contract Attack VectorsMedium

Tests knowledge of prevalent smart contract threats and attacker techniques.

RecursionHash TablesGraphsCertiK
Gas Optimization and SecurityMedium

Tests understanding of gas-related failure modes and how optimization affects security and correctness.

MathSortingGreedyCertiK
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2
Behavioral & Leadership12 questions · ~96 min
Prioritizing Conflicting High-Stakes WorkEasy

Tests prioritization under pressure, stakeholder management, and ownership when multiple urgent requests compete for limited time.

Stakeholder ManagementOwnershipDealing With AmbiguityCertiK
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3
More topics2 questions · ~16 min
Motivation for Smart Contract ResearchHard

Assesses motivation and how research translates into real-world security outcomes at CertiK.

researchCertiK
Solidity Vulnerability WalkthroughHard

Evaluates depth of smart contract security reasoning and practical remediation steps.

vulnerabilitiesCertiK

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