Top 21
Prep plan
Updated weekly · Last refresh Sep 20

eBay AI Engineer Interview Questions

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

21questions
~3htotal time
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1
System DesignStart here. 8 questions · ~64 min
Design Personalized Marketplace Search RankingHard

Design a personalized marketplace search ranker for 180M products at 420K peak QPS with tight latency and freshness constraints.

Trade-offsRoadmappingRisk AssessmenteBay
Design an LLM Serving PlatformHard

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

Cold StartFeature StoreModel ServingeBay
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2
Model Evaluation3 questions · ~24 min
Detect Production Drift in ModelsHard

How to detect data drift and concept drift in production using metric shifts, control charts, and calibration checks.

CalibrationAUC-ROCThreshold TuningeBay
Evaluate Models in ProductionHard

How to evaluate a production model using calibration, thresholds, and confusion matrix tradeoffs.

CalibrationAccuracyThreshold TuningeBay
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3
Behavioral & Leadership5 questions · ~40 min
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4
More topics5 questions · ~40 min
Feature Engineering for Sparse DataMedium

Explain how to engineer features for high-dimensional sparse data while controlling overfitting, dimensionality, and training cost.

data preprocessingFeature Engineeringsparse datasetseBay
Core AI Coding and DesignHard

Evaluates breadth across computer vision, ML/DL, implementation, and system design.

system designeBay
Designing a Large-Scale RAG PipelineHard

Tests advanced generative AI system design for retrieval, grounding, and scalable production behavior.

system designeBay
Embeddings and Vector SearchMedium

Tests NLP and retrieval design for recommendation quality using embeddings and vector search.

Vector SearcheBay
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The finish line: interview-readyComplete all 21 questions to finish this plan.