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 an SSH-Based Cloud Development Environment
Design an SSH-Based Cloud Development Environment Design a cloud development environment that is accessed by SSH rather than through a browser. Users ...
Design a Direct Messaging System for an E-commerce Marketplace
This question evaluates a candidate's ability to design a real-time messaging system, covering distributed systems concepts like durability, ordering ...
Review and Improve a Flawed Design Document
Review and Improve a Flawed Design Document You are given a design document for a system that has important omissions or unsafe assumptions. Review it...
Design a Rental Search and Booking Platform from Startup to Scale
Design a short-term rental search and booking platform that can evolve from a startup architecture to large-scale traffic. Balance fast, possibly stal...
Design a Reliable Job Scheduler
Design a Reliable Job Scheduler Design a service that accepts jobs to run at specified times and dispatches them to workers. The system should continu...
Design Instagram (Feed, Photos, and Friend Recommendations)
This question evaluates a candidate's ability to design a large-scale, read-heavy social media backend, covering data modeling for follow graphs, medi...
Design Inventory Availability and Order Placement
Design Inventory Availability and Order Placement Design the inventory portion of an e-commerce system with two core operations: 1. Query the currentl...
Design a Fitness Activity Tracking App with Followers and Leaderboards
Design a fitness activity tracking app where followers can see current trails, users can query top activities by time range, and leaderboards are supp...
Object-Oriented Design: Hotel Room Booking System
Object-Oriented Design: Hotel Room Booking System Design the object model and core service for a hotel room booking system. The service must let a cli...
Design a Food Rating System
This question evaluates skills in system design, data modeling, consistency and transactional guarantees, idempotency, scaling, and designing read-hea...
Design a URL Shortener (High-Level and Low-Level Design)
This question evaluates the ability to design a large-scale distributed system, covering both high-level architecture and low-level implementation det...
Design a Peer-to-Peer Money Transfer System
Design a peer-to-peer money-transfer product. Users can hold an account, send money to another user, view transfer history, and see an accurate balanc...
Object-Oriented Design: Snake Game
This question evaluates a candidate's ability to translate a familiar game into a clean object-oriented model, covering class decomposition, encapsula...
Design a Cron Job Scheduler
Design a distributed cron job scheduler — a service that triggers user-defined jobs on recurring, cron-style schedules. Assume worker (execution) capa...
Design a Tier-Aware AI Video Generation Service
Design a Tier-Aware AI Video Generation Service Prompt Design a service that accepts a generation request, runs an expensive video-generation workflow...
Design exchange–trading system message flow
Design the message contract and flow between a firm's trading system (OMS/EMS) and an external exchange. Assume: - The trading system sends orders and...
Design low-latency trading infrastructure
This question evaluates understanding of low-latency trading system architecture, networking and protocol trade-offs (TCP/IP vs UDP), time synchroniza...
Design Installment-Loan Payment Processing
Design Installment-Loan Payment Processing Design a payment-processing system for an existing user's active installment loan. A payment may be initiat...
Design an Enterprise Remote Browser Isolation System
Design an Enterprise Remote Browser Isolation System Design a system that runs browsing sessions on isolated virtual nodes and streams the result to e...
Design a Charity Donation Website
This question evaluates system architecture and reliability engineering skills, focusing on payment integration, asynchronous processing, idempotency,...