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 digital game shop backend
Design the backend for a simple digital game shop where users can buy virtual items (e.g., games, in‑game currency, skins) using credits in their acco...
Design a CI/CD pipeline with scheduler
Design a production-grade CI/CD pipeline (with its job scheduler) You are designing the internal CI/CD platform for a large engineering organization t...
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 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...
Design a distributed system end-to-end
System Design: Multi-Tenant Interactive Analytics Platform Context Design a distributed, multi-tenant analytics service that lets customers: - Ingest ...
Design cart and pricing engine classes
Design the core classes and interfaces for a cart & pricing engine for a food delivery marketplace (e.g., Uber Eats). This is an object-oriented / low...
Design an Airbnb wallet with holds and payouts
Design and Implement an Airbnb-Style Wallet (Ledger, Holds, FX, Idempotency) Problem Design and implement an Airbnb-style wallet system. This is an OO...
Design a fast host listing metrics page
Design the backend for a host (landlord) listings page. User flow: - Host opens a page showing many of their listings. - Host selects a date range. - ...
Explain VPCs and private/public network connectivity
What is a VPC (Virtual Private Cloud)? Explain the difference between a private network and a public network/subnet. How do private subnets connect to...
Design delayed job scheduler (LLD)
Design a Delayed Job Scheduler (Low-Level Design) Design a service that schedules a job to execute X seconds in the future with second-level accuracy....
Design an A/B testing platform
Design an internal A/B testing platform for a consumer product company. Product and engineering teams should be able to: - create, update, pause, and ...
Scale a file-crawling API using async jobs
You implemented a synchronous API that lists all files under a directory (recursive crawl). Now you need to scale it. Part A — Scaling discussion (no ...
Design ad click aggregator and file sync service
You have two system design prompts. 1) Design an ads click aggregation system Design a service that ingests ad click events at very high QPS and suppo...
Design a scalable coffee ordering notification system
Design an online coffee ordering system. Core flow - Customers browse menus for nearby coffee stores, place orders, and pay. - Coffee stores receive o...
Design a Global Marketing Email Platform
Design a marketing email system for a large consumer marketplace. The business wants to run campaigns that may send 2-3 marketing emails within a 15-m...
Design a News Feed and Mail Service
Design the following systems: 1. Aggregate news feed Build a service that ingests articles from many publishers, deduplicates and ranks them, and s...
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 a Marketing Email System
Design a marketing email system for a ticket marketplace. The business wants to run marketing campaigns that send 2 to 3 emails during a configured 15...
Design a Book Purchase Broker
Scenario Design a system that accepts a user's request to buy a book by title, ISBN, or another identifier. The request includes a maximum target pric...
Design a Slack-like real-time messaging system
System Design: Slack-like Messaging (DMs + Channels) Design a Slack-like real-time messaging system that supports: Core features - Direct Messages (DM...