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 Spring Boot for high availability and background work
This question evaluates a candidate's competency in designing highly available, load-balanced Spring Boot applications and architecting resilient back...
Design Broadcast Scheduling APIs
Design a broadcast messaging service for companies. Requirements: - Each company has a set of subscribers. - A client can schedule a message to be bro...
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. The store...
Design a Distributed Rate Limiter
This question evaluates a candidate's understanding of distributed systems, rate limiting strategies, API design, consistency and scalability trade-of...
Design a crypto trading web frontend
Design the front-end architecture for a retail cryptocurrency trading web app (like a spot exchange). Assume the product needs these core screens and ...
Design a Relational-to-DynamoDB Migration System
Design a production migration system that moves an existing e-commerce service from a relational database to DynamoDB with minimal downtime. Your desi...
Identify and handle race conditions
Concurrency in an In-Memory Key-Value Store and Hit Counter Context and Assumptions Assume you are implementing an in-memory key-value store and a hit...
Design a trending-articles platform
Design a Near Real-Time Trending-Articles Platform Design the backend that surfaces trending articles in near real time for a large-scale consumer pro...
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 review system with voting and rewards
Design a Scalable Product Review System with Voting and Rewards You are designing a reviews feature for a large e-commerce marketplace. Customers can ...
Design a file upload and scanning report system
This question evaluates a candidate's ability to design scalable, secure distributed systems for asynchronous file handling, including API design, dat...
Design Food Ratings and Driver Payouts
Design the backend for a food-delivery product (think DoorDash-style marketplace). The system has two distinct surfaces that you must address together...
Design multi-tenant ingestion and processing platform
This question evaluates a candidate's ability to architect scalable, multi-tenant data ingestion and processing platforms, assessing competencies in t...
Debug round-robin request router
Debug round-robin request router Round-Robin Request Router with Health and Dynamic Membership You are given a list of backend servers and an incoming...
Design a Distributed Crossword Solver
This question evaluates competency in distributed systems design, scalable indexing and storage, parallel search and constraint-satisfaction reasoning...
Compute top-N posts in a workspace
Design a feature that returns the top-N posts (e.g., Confluence pages/blog posts) in a workspace. Requirements: - Define what “top” means (e.g., views...
Design a News Aggregator
Design a news aggregation system that collects articles from many external news sources and serves a unified feed to end users. A key constraint is th...
How to host many domains on one IP?
You have a single Linux server with one public IPv4 address. A coffee shop, butcher shop, and auto repair shop each want their own website and their o...
Design a Google News-like aggregator
Design a Google News–like News Aggregation Platform Design a multi-region news aggregation platform (in the spirit of Google News) that ingests conten...
Design a News Aggregation Feed
Design a large-scale news aggregation feed similar to a major news app. The system ingests a large volume of raw news articles from many sources, incl...