Software Engineer System Design Interview Questions
Practice 904 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 Robust Large-Input Processing
The string-reduction algorithm above is now part of a backend service. Each job reads a text object from S3-compatible storage, applies the transforma...
Design CRUD APIs with async jobs
Scenario Design a small backend service that manages a core entity with CRUD operations and also supports an asynchronous background job triggered by ...
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 an employee directory with reporting queries
Scenario Design an internal employee management system. Functional requirements - CRUD for employees: - Create/update employee profile (name, title,...
Design a large-scale distributed rate limiter
Problem Design a multi-tenant, large-scale distributed Rate Limiter service used by many internal teams. The service should allow product teams to enf...
Design a secure trading app on AWS
Scenario Design a secure, Robinhood-like mobile/web application on AWS, with a deep dive into: 1. User profile management (account creation, authentic...
Design real-time delivery tracking system
Question Design a real-time delivery / courier-tracking platform that gives dispatchers, operations, and customers live visibility into each courier's...
Design multi-core service startup scheduler
Service Startup Scheduler on a Host with M CPU Cores Context You are given a directed acyclic graph (DAG) of services where an edge u → v means servic...
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 street-view image ingestion and storage system
Prompt Design a system to ingest, store, and process street-level images for a "Street View"-like product. Scenario - A fleet of taxis is equipped wit...
Design an async job system and cache layer
Design two systems. You can assume a large-scale production environment; focus on clear APIs, data models, scaling, reliability, and trade-offs. Part ...
Design a Conversational AI Assistant
Design a large-scale conversational AI product similar to ChatGPT. Users should be able to: - start a new conversation, - send prompts, - receive stre...
Design a URL shortening service
Design a scalable backend service for shortening URLs (similar to popular URL shortener products). Describe a system that supports at least the follow...
Design a scalable game app store
You are asked to design a backend system for a game app store. The product is similar in spirit to an app marketplace but focused on games. Requiremen...
Design a collaborative spreadsheet
Design an online spreadsheet service similar to Google Sheets. Users can open the same workbook concurrently and directly edit cells, formulas, rows, ...
Design an Accurate Click Aggregator
Design an ad click aggregation system. The system receives click events from multiple sources, including web, mobile apps, and TV devices. It must ing...
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 a retail trading platform
Design a Retail Stock Trading Platform (Robinhood-like) Design a mobile-first retail stock trading platform for U.S. equities, similar to Robinhood. T...
Design a client-side comment system
Scenario You are asked to build a client-side comment system (no backend required). The focus is on data modeling, UI behavior, and persistence. Requi...
Design a hotel reservation system
Design an online hotel reservation system. The system should allow customers to search for hotels, view available room types, create a reservation, an...