Topic
ML System Design interview questions
332 ML System Design questions from 100 companies, with hints, runnable code and solution walkthroughs.
13 easy187 medium132 hard
ML System Design interview questions by the numbers
Last updated
Katkat has 332 ML System Design interview questions from 100 companies; the most come from OpenAI (7%), Meta (7%) and Anthropic (6%). By difficulty: 4% easy, 56% medium and 40% hard. The most common round is Onsite (56%). Frequent concepts include System Design, ML System Design, Scalability and LLM.
Companies (100)
Difficulty
- Easy4% · 13
- Medium56% · 187
- Hard40% · 132
Interview rounds
- Onsite56% · 186
- Technical Screen42% · 138
- Online Assessment2% · 6
- HR Screen1% · 2
Roles
- Machine Learning Engineer54% · 178
- Software Engineer36% · 121
- Applied Scientist4% · 13
- Data Scientist4% · 13
- Member of Technical Staff, ML Systems1% · 2
Frequent concepts
- System Design17% · 56
- ML System Design10% · 32
- Scalability8% · 28
- LLM8% · 26
- RAG8% · 26
- Ranking6% · 20
Most mentioned in interview experiences
- 1.Design a Spam Review Workflow with Classifiers, AI Agents, and Human Labelers2 reports
- 2.Add an LLM-backed recommendation API to an existing service with RAG and prompting1 report
- 3.Applying LLMs to Autonomous Driving Despite Hallucination and Real-Time Limits1 report
- 4.Architect an asynchronous RL post-training system1 report
- 5.Build a Mistral-powered RAG agent1 report
- 6.Build AI chat for spreadsheets1 report
- 7.Choose File Storage Tiers Using Access Predictions1 report
- 8.Compare Single-Agent and Multi-Agent Designs1 report
- 9.Data quality, lineage, monitoring and backfill design for an ML feature store1 report
- 10.Describe model-to-GPU execution pipeline1 report
Counted from 82 candidate interview experiences on Katkat. How we collect and count
Showing 181–210 of 332 results
This question evaluates a candidate's competence in designing end-to-end image and multimodal generation systems, covering data collection and curation, model architecture and conditioning choices, training objectives, safety and content filtering, evaluation metrics, deployment, monitoring, and critical analysis of relevant research.
MetaMachine Learning EngineerML System DesignTechnical ScreenThis question evaluates skills in designing real-time, large-scale machine learning recommender systems that combine geospatial candidate generation, feature engineering, ranking models, personalization, privacy controls, fraud detection, and operational constraints like latency and throughput.
MetaMachine Learning EngineerML System DesignOnsiteDesign place-of-interest ML system evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
MetaSoftware EngineerML System DesignOnsiteThis question tests the ability to design an end-to-end multimodal classification system for detecting policy-violating content (weapon sales) while balancing latency, precision, and robustness against adversarial evasion.
MetaMachine Learning EngineerML System DesignOnsiteTests your ability to articulate an end-to-end production AI/ML system you designed, detailing the business justification, technical architecture, evaluation strategy, failure modes, and your individual contributions.
MetaSoftware EngineerML System DesignTechnical ScreenThis problem tests the ability to design an ML-driven safeguard system that prevents private codebase exposure during the training, fine-tuning, and inference phases of a coding agent.
MetaMachine Learning EngineerML System DesignTechnical ScreenThis question tests the ability to design an end-to-end system for enforcing strict structured formatting (e.g., Docx/Markdown) on LLM-generated text, focusing on constraint enforcement and reliability.
MicrosoftMachine Learning EngineerML System DesignOnsiteThis problem evaluates the ability to design a scalable, low-latency memory system for an LLM-based chatbot that stores and retrieves user-specific facts to provide personalized responses.
MicrosoftSoftware EngineerML System DesignOnsiteDesign an ML moderation system for multilingual seller descriptions at marketplace scale. Cover policy-aware labels, severity-based actions, calibrated thresholds, human review and appeals, low-latency serving, selective rescans, auditability, drift, and adversarial abuse.
MicrosoftData ScientistML System DesignTechnical ScreenThis question evaluates skills in designing scalable, low-latency product search systems, covering information retrieval, ranking model design, feature generation, data ingestion and indexing pipelines, and serving infrastructure.
MicrosoftMachine Learning EngineerML System DesignOnsiteThis problem tests your ability to design a multi-stage retrieval and ranking architecture for a RAG system, focusing on balancing search accuracy, latency, and system scalability.
MicrosoftSoftware EngineerML System DesignOnsiteThis question assesses the ability to architect a scalable Retrieval-Augmented Generation (RAG) system, focusing on data indexing, retrieval strategy, and mitigating common LLM issues like hallucinations and safety.
MicrosoftMachine Learning EngineerML System DesignOnsiteThis question tests the ability to design an end-to-end RAG system for news, focusing on temporal data relevance, hybrid retrieval strategies, and mitigation of LLM hallucinations.
MicrosoftMachine Learning EngineerML System DesignHR ScreenThis problem tests the ability to architect a scalable ML pipeline that balances personalized email prioritization with LLM-based summarization while addressing low-latency requirements and data safety.
MicrosoftMachine Learning EngineerML System DesignOnsiteThis problem tests the ability to design an end-to-end data validation pipeline for spreadsheet data and determine the necessity of fine-tuning a Large Language Model (LLM) for specific structured data tasks.
MicrosoftMachine Learning EngineerML System DesignTechnical ScreenThis question evaluates understanding of Transformer architectures and practical LLM deployment competencies, covering attention mechanisms, token and positional representations, computational complexity, and production concerns like latency, cost, quality, safety, and privacy.
MicrosoftMachine Learning EngineerML System DesignTechnical ScreenA machine learning design exercise: given a tab-separated HR dataset with features such as age, job role, monthly income and overtime, predict which employees will leave and explain which factors drive attrition. It covers feature processing, model choice, class imbalance, evaluation metrics, threshold selection and interpretability.
MicrosoftApplied ScientistML System DesignOnsiteCompare vocabulary and hidden-dimension embedding sharding through per-rank storage, token routing, hidden-state layout, skew, and downstream communication.
MicrosoftSoftware EngineerML System DesignOnsiteShard an LM head by vocabulary or hidden width, distinguishing complete logits from partial dot products and exact distributed top-k from full-distribution sampling.
MicrosoftSoftware EngineerML System DesignOnsiteDesign an autonomous, LLM- or ML-driven portfolio rebalancing agent integrated with deterministic guardrails, pre-trade compliance checks, and audit logging. The design must guarantee safety, idempotency, strict separation of concerns, and full state reconstructibility.
MillenniumData ScientistML System DesignTechnical ScreenDesign an end-to-end Retrieval-Augmented Generation (RAG) agent using the Mistral API to answer technical queries over internal developer documentation. The question evaluates chunking strategies, dense retrieval, prompt orchestration, latency optimizations, and evaluation methodologies.
Mistral AIMachine Learning EngineerML System DesignTechnical ScreenThis question evaluates a candidate's skills in building a retrieval-augmented generation (RAG) system, covering document ingestion, chunking, embedding generation, vector indexing, retrieval, LLM API-driven streaming completions, short-term conversation memory, and operational reliability features.
Mistral AISoftware EngineerML System DesignTechnical ScreenThis question evaluates system-design and ML inference orchestration skills, assessing competency in composing multi-stage pipelines that manage heterogeneous resource profiles (CPU, GPU, memory) and trade-offs between latency and throughput.
Mistral AISoftware EngineerML System DesignTechnical ScreenDescribe model-to-GPU execution pipeline evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
NVIDIASoftware EngineerML System DesignTechnical ScreenDesign and benchmark optimized inference pipelines evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
NVIDIASoftware EngineerML System DesignTechnical ScreenThis question evaluates expertise in designing low-latency, high-throughput ML-powered systems for online decisioning, covering competencies in real-time inference, feature pipelines, model serving, scaling, and operational reliability within the ML System Design domain.
NVIDIASoftware EngineerML System DesignTechnical ScreenDiscuss Transformer LLM Design evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
NVIDIAMachine Learning EngineerML System DesignTechnical ScreenThis question evaluates a candidate's understanding of ML compiler optimizations and hardware-aware runtime strategies, assessing competencies in techniques such as kernel fusion, quantization, memory planning, scheduling/tiling, layout selection, sparsity, mixed precision, graph-level rewrites and runtime tactics.
NVIDIASoftware EngineerML System DesignTechnical ScreenThis interview question evaluates ML product requirements, data/labeling, modeling, serving architecture, evaluation, monitoring, and trade-offs in a realistic interview setting. A strong answer for Explain ML framework trends states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
NVIDIASoftware EngineerML System DesignTechnical ScreenThis problem tests your understanding of performance bottlenecks in large-scale machine learning systems, requiring you to prioritize optimization strategies across memory, compute, and communication dimensions.
NVIDIASoftware EngineerML System DesignTechnical Screen