Top 16
Prep plan
Updated weekly · Last refresh Sep 22
9

9fin AI Engineer Interview Questions

The questions to prepare for a 9fin AI Engineer interview. Questions from real interview reports rank first. Updated daily.

16questions
~2htotal time
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1
Generative AI & LLMsStart here. 8 questions · ~64 min
Explain Vector Search in RAGMedium

Design a grounded document Q&A system and explain how vector search improves retrieval quality, latency, and hallucination control in RAG.

Vector SearchPrompt EngineeringRAG99fin
Evaluate an LLM SystemMedium

Explain how to evaluate a generative model using offline and online methods, with attention to hallucination, product metrics, and experiment design.

HallucinationPrompt EngineeringLLM Evaluation99fin
Real-Time RAG with UpdatesHard

Assesses your design for keeping RAG retrieval current under real-time financial updates.

real-time updates99fin
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2
System Design3 questions · ~24 min
Design an LLM Serving PlatformHard

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

Cold StartFeature StoreModel Serving99fin
Cost-Efficient LLM ServingMedium

Evaluates system design trade-offs for production LLM serving at scale.

user experience99fin
LLM Caching for Fresh DataMedium

Assesses your ability to balance latency, cost, and data freshness in LLM systems for finance.

99fin
3
Behavioral & Leadership4 questions · ~32 min
Staying Current in AIEasy

Tests proactive learning, judgment, and ownership in turning AI industry updates into practical team impact.

CommunicationOwnershipDealing With Ambiguity99fin
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4
More topics1 question · ~8 min
The finish line: interview-readyComplete all 16 questions to finish this plan.