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 a multi-level API rate limiter
Scenario You are building a backend for an “insight platform”. The platform exposes HTTP APIs that are called by many tenants and many end-consumers. ...
Design One-to-One Chat
Design a scalable one-to-one chat system. Scope: - Only direct one-to-one messaging is required. - Group chat, public channels, workspace features, an...
Design a banking system with payments and merging
Design a banking system (progressive requirements) Design the backend for a simplified banking system that supports accounts, money movement, schedule...
Design a concurrent web crawler
System Design: Concurrent Web Crawler (Threads) Design and implement a basic web crawler that fetches pages concurrently using a thread executor (e.g....
Design a car rental booking system
System Design: Car Rental Booking System Design an online car rental system (like Hertz or Avis) that lets users search for available rental cars, get...
Design a Hotel Booking System
Design the backend for an online hotel booking platform. The system should let users: - search for hotels by location, dates, and number of guests - v...
Design a Distributed Metrics Counter
Design a distributed metrics counter service for internal product telemetry. The service should support: - increment(metric_name, delta, tags, timesta...
Review a Web Application Architecture
You are given a high-level architecture diagram for a web application: Client/Web App -> DNS -> Load Balancer -> Application Service -> Database The a...
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 User Re-engagement Notifications
Design a re-engagement system for an AI assistant product. The system should support at least two use cases: 1. Send relevant notifications to inactiv...
Design Slack-like chat system
Question Design the chat subsystem for an app like Slack/Discord. State your assumptions (scale, retention, consistency needs) and propose an end-to-e...
Design delivery driver payment system
Design a delivery-driver payment system Design and implement an in-memory, object-oriented service that tracks delivery-driver work and computes payro...
Design an AI playground editor
Design a full-stack AI playground web application similar to a chat product, but with one document-like component that interleaves user prompts and mo...
Model data for an ads platform
Design a data model (logical schema) for an advertising platform. Include core entities such as: - Business/account (advertiser) - Campaign and budget...
Design A Scalable Web Crawler
Design a scalable web crawler that discovers, fetches, parses, and stores web pages for downstream use such as search indexing or content analysis. Yo...
Design a typeahead search service
Design a search autocomplete system for a large application. As a user types a prefix, the system should return relevant suggestions with low latency....
Design a TikTok-like short video platform
Design a TikTok-like short-video product. Core user stories 1. Users upload short videos (e.g., 10–60 seconds). 2. Users watch an infinite For You fee...
Design a Twitter-like microblogging service
Design a Twitter-like microblogging system. You can describe it verbally and with structured notes. Requirements: - Users can post short messages. - U...
Design a Weighted Log Distributor
Design a high-throughput log distributor. Agents running on application and infrastructure hosts send packets to the distributor. Each packet may cont...
Design signup and login service
Design a basic email/password authentication service that supports user sign-up and login. You may not rely on third-party identity providers (no OAut...