Top 29
Prep plan
Updated weekly · Last refresh Sep 18

HackerOne AI Engineer Interview Questions

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

29questions
~5htotal time
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1
System DesignStart here. 4 questions · ~37 min
Design an LLM Serving PlatformHard

Design an LLM serving system that balances latency, cost, scalability, and safety for production traffic.

Cold StartFeature StoreModel ServingHackerOne
Embedding-Based Dedup SystemHard

Tests system design for embedding-based deduplication in high-volume security workflows.

Vector SearchdeduplicationFeature StoreHackerOne
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2
Coding5 questions · ~47 min
Deduplicate Vulnerability ReportsEasy
Practice

Remove duplicate vulnerability reports in one pass using a hash set while preserving first-seen order.

Hash TablesdeduplicationArraysHackerOne
Vector Similarity for ReportsHard
Practice

Find the top-k vulnerability reports by cosine similarity using normalization and a bounded heap.

CodingMathArraysHackerOne
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3
Generative AI & LLMs7 questions · ~65 min
Production LLM API IntegrationHard

Tests ability to design robust, scalable LLM API integrations with reliability and graceful degradation.

latencyLLM AgentsModel ServingHackerOne
Evaluate RAG Triage QualityMedium

Tests ability to define experiments and metrics to validate RAG improvements for triage quality.

RetrievalRAGLLM EvaluationHackerOne
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4
Behavioral & Leadership11 questions · ~102 min
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5
More topics2 questions · ~19 min
Measure LLM Assistant QualityMedium

Tests ability to define evaluation criteria and quality measurement for client-facing LLM assistants.

Evaluation TechniquesAccuracyModel MetricsHackerOne
Metrics for Vulnerability PrioritizationMedium

Tests ability to select metrics that reflect ranking and triage effectiveness for security workflows.

PrecisionModel MetricsRecallHackerOne
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