Software Engineer System Design Interview Questions
Practice 1,082 real System Design interview questions for Software Engineer roles. From companies including Meta, OpenAI, Amazon, Anthropic, Google.
"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 Music Search, Playlists, and Playback Controls
Design the domain model and service interfaces for music search, ordered playlists, and playback controls. The discussion covers canonical catalog dat...
Design a bank account ledger
Design a Bank Account Ledger Design a bank account ledger service for a fintech app. The system is built on an immutable, double-entry ledger so it is...
Design a Real-Time Player Matchmaking Service
Design a Real-Time Player Matchmaking Service Prompt Design a service through which a player can join a matchmaking queue, cancel a pending request, b...
Design a delivery cost system
Design an object-oriented, in-memory Delivery Cost System for a food-delivery company. Drivers register with an hourly rate, completed deliveries are ...
Design Real-Time Collaborative Comments
Design a real-time commenting system for a collaborative canvas or document. Users should see new comments quickly, receive updates on threads, and re...
Design a Scalable Notification System
This question evaluates a candidate's ability to design a large-scale, asynchronous notification platform that fans messages out across push, email, a...
Design an In-Flight Entertainment Experience for a Small Screen
Design an In-Flight Entertainment Experience for a Small Screen A budget airline wants an in-flight entertainment system that helps differentiate its ...
Design a Time-Series Database
Design a Time-Series Database Design a database for ingesting and querying timestamped measurements. A data point belongs to a logical series identifi...
Build Reliable Employee-Operations and Expense Intelligence Systems
Build Reliable Employee-Operations and Expense Intelligence Systems Design four connected capabilities: a tagged event counter for dashboards and bill...
Design a geography-aware virtual card service
This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...
Design a Cloud File Storage and Sync Service (Google Drive)
This question asks for the end-to-end design of a cloud file storage and sync service, evaluating a candidate's grasp of distributed systems fundament...
Design an Instagram-Style Social Feed
A Meta software-engineer onsite system-design question: design an Instagram-style social feed (photo/video sharing with a personalized home feed). It ...
Design a Slack-Like Messaging System
This question evaluates a candidate's ability to architect a real-time team messaging platform, testing competencies in distributed systems, data mode...
Design a personalized news aggregator
Design a Google News-style personalized news aggregator. The system continuously collects articles from many third-party publishers by polling their A...
Design a Log Collection System
This question evaluates a candidate's ability to design a scalable, fault-tolerant log collection and search pipeline, covering distributed ingestion ...
Design a Slack-Like Messaging System
Design a Slack-like team messaging system focused on sending and receiving messages in real time. Your design should support workspaces with channels ...
Design An AI Playground For Very Large Prompts
Design an AI playground that lets users create, edit, run, and revisit prompts. The interviewer is especially interested in how the system handles ver...
Design an A/B Testing Platform
Design an A/B Testing Platform Design a platform that lets product teams define an experiment, assign eligible users consistently to control or treatm...
Design a Distributed Metrics Counter
This question evaluates a candidate's competency in designing scalable, highly available distributed systems for real-time telemetry ingestion and agg...
Design fulfillment truck routing and inventory system
Scenario You are designing the software platform for a large e-commerce fulfillment network that plans truck routes and manages container/inventory mo...