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Chainlink Labs Interview Questions

The questions to prepare for Chainlink Labs interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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1
SQL & Data ManipulationStart here. 5 questions · ~51 min
2
Coding6 questions · ~61 min
Detect and Remove Duplicate EventsMedium
Practice

Use a hash set to detect duplicate smart contract events and preserve the first occurrence of each event.

Hash TablesdeduplicationArraysChainlink Labs
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3
Pipelines6 questions · ~61 min
Handle Traffic Spikes in Data PipelinesMedium

Design a spike-resilient AWS data pipeline handling 750K events/sec while preserving low latency, data quality, and replay safety.

InfrastructureIdempotencyQualityChainlink Labs
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4
Execution6 questions · ~61 min
Recover a Slipping ProjectMedium

Explain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.

Success CriteriaRoadmappingRisk AssessmentChainlink Labs
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5
Metrics6 questions · ~61 min
Define Success for a ProjectEasy

Define what success means for a project using clear KPIs, a north star, and supporting metrics.

KPIsSuccess CriteriaDiagnosisChainlink Labs
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6
Strategy6 questions · ~61 min
Develop a New Market GTM StrategyEasy

Approach for building a go-to-market strategy for a new market or solution.

Competitive AnalysisGo-to-MarketGrowth StrategyChainlink Labs
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7
More topics15 questions · ~152 min
Advocate for Users in DesignMedium

Explain how to keep user needs central throughout the design process, from research through launch and iteration.

User ResearchUser NeedsValue PropositionChainlink Labs
Functional vs Non-Functional TestingEasy

Tests your ability to classify testing types and align them to product quality goals.

Chainlink Labs
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