Machine Learning Engineer System Design Interview Questions
Practice 40 real System Design interview questions for Machine Learning Engineer roles. From companies including Meta, OpenAI, Amazon, Snapchat, Microsoft.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Design a multimodal RAG assistant
Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...
Design a distributed key-value store
Design a distributed key-value store Design a Distributed Key–Value Store (Technical Screen) Context You're designing a cloud-native, multi-tenant key...
Design a scalable MapReduce pipeline
Design a scalable MapReduce pipeline Design a Large-Scale MapReduce-Style Data Processing System Context You are designing a batch pipeline, using a M...
Design a regional surge pricing strategy
Scenario You operate a ride-hailing platform. You need to design a system that sets surge multipliers (dynamic pricing) for a given region. Task Desig...
Design a scalable chatbot platform
This question evaluates a candidate's ability to design a scalable, production-grade chatbot platform that integrates ML-based inference, multi-turn c...
Design Apple News without ML
Design an initial search and content-discovery system for a news application similar to Apple News, assuming you do not have a trained ranking model y...
Design a recommendation system from scratch
This question evaluates expertise in recommender systems and related competencies including machine learning-based candidate generation and ranking, d...
Design versioned in-memory key-value store
This question evaluates understanding of in-memory data structures, versioning semantics, rollback mechanisms, and performance trade-offs between time...
Design a scalable service and model performance
System Design: Multi-Region, 50k QPS, p95 < 100 ms Context Design an online, read-heavy key-value service (for example, a user profile or feature look...
Design a system to detect weapon posts
This question evaluates system design and machine learning engineering competencies, including multi-modal content detection, real-time model serving,...
Design a scalable metrics monitoring system
Design a scalable metrics monitoring system Design a Metrics Monitoring System for Large-Scale Services Context You are designing a metrics monitoring...
Design chat and online chess
This question evaluates a candidate's ability to design large-scale, real-time consumer systems, testing competencies in scalable architecture, data m...
Design an Online Coding Judge
This question evaluates system design and scalability skills for building a high-throughput, low-latency online coding judge, covering distributed arc...
Design async job orchestration and notification service
Design async job orchestration and notification service System Design: Batch Orchestration Over an External Asynchronous Cluster Context You are desig...
Design a scalable recommendation serving system
Scenario You are designing the online serving infrastructure for a large-scale recommendation system (e.g., a delivery app or e-commerce feed). The in...
Design a weapon-ad harmful content detection system
This question evaluates skills in end-to-end system design and applied machine learning for multi-modal harmful content detection, covering scalabilit...
Design a recommendation system
System Design: Large-Scale Home-Feed Recommendation System Problem Design a large-scale recommendation system for a consumer app's home feed. Describe...
Design scalable media storage and delivery
System Design: Global UGC Photos and Short Videos Store/Delivery Context Design a globally distributed system to store and deliver user-generated phot...
Design a collaborative spreadsheet backend
Design a web-based spreadsheet service similar to Google Sheets, with emphasis on backend architecture and data models. Focus areas: - Multiple users ...
Design NL-to-SQL performance optimization assistant
This question evaluates a candidate's ability to design a secure, reliable, and cost-conscious natural-language-to-SQL performance diagnostic system t...