Software Engineer System Design Interview Questions
Practice 893 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 Cross-Border Money Transfer Service
Design a cross-border money transfer service similar to a consumer remittance product. Users in one country should be able to send money to recipients...
Design a backend for an online checkers game
Design the backend system for an online, turn-based checkers game. Requirements Cover (at minimum): 1. Core gameplay - Create a new game and initia...
Design an inventory system
System Design: Inventory Management with Real-Time Stock and Ordering Context You are designing an inventory management service for a retail/marketpla...
Protect SLA and Choose Storage
You own a service that calculates delivery-order payments from order lifecycle events. Discuss two design questions: 1. If an upstream dependency sudd...
Design a Ticketmaster-like ticketing system
System Design: Online ticketing platform (Ticketmaster-like) Design a system that sells tickets for events (concerts/sports) with seat selection. Core...
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 camera access-control service
Design an Access-Control Service (Users, Cameras, Nested Groups) Context You are building a multi-tenant access-control service for a physical-securit...
Design an in-memory key-value database
Design an In-Memory Key–Value Database (Technical Screen) Context Build an in-memory key–value (KV) database that offers high-throughput, low-latency ...
Design task scheduler with dependencies
Design a Distributed Task Scheduling Infrastructure Context Design a distributed task scheduling and orchestration system that can run at scale, suppo...
Design real-time stock price viewer
System Design: Real‑Time Stock Prices Viewer (No History) You are designing a real‑time system that lets clients view current stock prices only. No hi...
Design a natural-disaster notification system
Scenario You work for a vacation-rental / homestay platform. You need to design a natural-disaster notification system that alerts affected hosts and ...
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 Multi-Tenant Online IDE
Design a browser-based online IDE for multiple enterprise tenants. Each tenant is an organization with its own users, projects, source files, secrets,...
Design a low-latency trading platform
Design the architecture for a high-frequency fixed-income trading system. The platform should ingest live market data from multiple venues, maintain l...
Design a loan application system
System Design: End-to-End Online Loan Application Platform Context Design a small online lending platform where applicants select loan products and su...
Design Internal Chat and Re-engagement Emails
Design an internal chat system for an event marketplace company. Requirements: - Employees can send and receive one-to-one messages in real time. - Cl...
Design real-time game matchmaking service
Design a Real-Time Game Matchmaking Service Context You are designing the matchmaking subsystem for an online multiplayer game that supports multiple ...
Design a generic key-value store
Design a Generic, Type-Safe Key-Value Store API Context You're asked to design a reusable key-value store with a generic, user-friendly API suitable f...
Design in-memory DB with TTL and backup
Question Design and implement an in-memory, versioned key → (field → value) database that supports per-field TTL, time-travel reads, lexicographically...
Design a global real-time notification system
Problem Design a global, real-time notification system that can deliver messages via: - Mobile/Web push - Email - SMS The system supports 100M+ users ...