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 a multi-tenant quota system
Design a Global Multi-Tenant Quota Service (Single Global Quota per User) Context Multiple upstream products (e.g., Drive, Photos) share a single glob...
Design a job scheduler
Design a Scalable Distributed Job Scheduler Context Design a multi-tenant, horizontally scalable job scheduler for backend services. The system must p...
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 a highly reliable account balance system
Scenario You are designing a backend service that stores and updates user account balances (like a wallet/bank ledger). The system must be highly reli...
Design Publisher Configuration Rules
Design a supply-side advertising configuration system that manages publisher-specific rules. A publisher may own many websites, mobile apps, channels,...
Design a production file storage service
System Design: Production-Grade File Storage Service Problem Design a production-grade file storage service with the following APIs, semantics, and co...
Design a Reliable Payment Processing System
Design a Reliable Payment Processing System Design a payment-processing service for merchants. A client creates a payment, the service submits it to a...
Design real-time kitchen order fulfillment system
Backend Engineering Challenge: Real-time order fulfillment Design and implement (conceptually) a single-process, real-time backend system for fulfilli...
Design concurrent range-aware file caching client
Design concurrent range-aware file caching client System Design: High-throughput Client-side Ranged-read File Cache You are asked to design and specif...
Design an Enterprise AI Adoption Agent for a Global Company
Design an enterprise AI adoption agent for a global company with internal data, tools, and security constraints. `hint Hint 1 Start by stating assumpt...
Design a real-time delivery dashboard
System Design: Real-Time Delivery Operations Dashboard Context Design a real-time operations dashboard for a two-sided delivery platform. The dashboar...
Design Search And Web Crawling Systems
This question evaluates system-design and distributed-systems competencies including large-scale indexing and query-serving, relevance ranking and per...
Design a 3-day donation platform
Design: Online Donation Platform for 3-Day Campaigns Context Design an online donation platform optimized for short, 3-day fundraising campaigns. Each...
Design A WhatsApp-Style Messaging System
Design a messaging system similar to WhatsApp. Users should send one-to-one and group messages, receive messages in near real time, and recover messag...
Design an Online Game Leaderboard
Question Design the backend system for an online game's leaderboard. The system should support: 1. Recording and updating player scores from game sess...
Design in-memory trade subscription processor
You are asked to design and implement the internal logic of an in-memory trade subscription processor in C++. A simplified interface is provided: `cpp...
Design an intersection traffic-light system
System Design: Traffic-Light Control for a Multi-Road Intersection Context Design the software and systems for controlling a signalized, multi-approac...
Design a distributed job scheduler
This question evaluates understanding of distributed systems, reliable job scheduling and dispatch, fault-tolerant worker coordination (heartbeats and...
Design a global real-time notification system
This question evaluates competency in designing large-scale distributed systems for global real-time notifications, covering scalability, multi-region...
Design a Reliable Bank Payment System
Design a Reliable Bank Payment System Design a backend that accepts a customer's request to transfer money, tracks the payment through processing, and...