Software Engineer System Design Interview Questions
Practice 944 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 a large-scale ticketing system
Design an online ticketing system similar to Ticketmaster that supports very high concurrency for popular events where many users try to purchase tick...
Design an ads audience targeting system
Problem Design an ads audience targeting system that allows advertisers to upload large user lists and then target (or exclude) those users when servi...
Design a GPU-aware pod scheduler
GPU-Aware Pod Scheduler and Cluster Manager (OO Design) Context You are designing a simplified, object-oriented cluster manager with a GPU-aware pod s...
Improve shopping cart latency and stock notifications
You are given an existing e-commerce shopping cart system (web/mobile) that already supports adding/removing items and viewing the cart. The interview...
Design an On-Demand Delivery Platform
Design an on-demand local delivery marketplace for restaurants or grocery stores. The platform should support customers browsing merchants, building s...
Design Food Delivery Cart
Design the backend for a shopping cart in a large food-delivery application. Users should be able to: - create or resume a cart for a restaurant, - ad...
Design multi-tenant ingestion and processing platform
System Design Prompt Design a multi-tenant data ingestion + processing platform used by thousands of internal teams. Requirements - Multi-tenant: each...
Design a retail trading platform
System Design: Retail Stock Trading Platform (Robinhood-like) Context and Assumptions Design a mobile-first, retail stock trading platform with a clea...
Determine identical files ignoring metadata
Determine Byte-Identical Files Using Hashing (Ignore Filesystem Metadata) Context Assume we care only about the raw file contents (the byte stream rea...
Design a Top-K Ranking Service
Design a service that returns the top K most frequent items for a configurable time window, such as the top 10 search queries in the last hour or the ...
Design an Online Coding Judge
Design a large-scale online coding practice and contest platform. Users should be able to browse programming problems, submit code in multiple languag...
Design and implement an Airbnb wallet
Design an Airbnb-Style Wallet (OOD + Runnable Code) Context You are asked to design an in-app wallet system that supports both guests and hosts. The w...
Design a flexible expense reimbursement system
System Design: Expense Reimbursement with Pluggable Rules and Group Constraints Context Design an enterprise expense reimbursement platform where admi...
Design a scalable notification system
Problem Design a notification system for a company at Airbnb-like scale that can send notifications to different user types (e.g., customers/guests, h...
How would you throttle a crawler?
The crawler above is now a production service. Expanding each page requires an outbound HTTP or API call to fetch its links, and upstream services may...
Design an encrypted log collection system
Scenario Design a log collection system that gathers logs/events from services running in multiple edge data centers and delivers them to a central pl...
Design stock price time-series store and query
Problem Design a platform that stores stock prices over time and can be queried later. Core functionalities 1. Ingest price: The system receives event...
Design a Slack-like real-time messaging system
System Design: Slack-like Messaging (DMs + Channels) Design a Slack-like real-time messaging system that supports: Core features - Direct Messages (DM...
Design a distributed tree node counter
Distributed Tree Node Count with Two Messages You are given an N-ary tree of machines (one process per node). Each node knows its parent (if any) and ...
Design Uber Eats-style search function
Design the search function for a large-scale food delivery platform similar to Uber Eats. A user opens the app and types queries such as: - Restaurant...