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 CI/CD system with stuck-job handling
Scenario Design a CI/CD platform similar to GitHub Actions/Jenkins that: - Triggers pipelines on events (e.g., push/PR/merge). - Runs pipelines as a D...
Design Uber Eats-style search function
Design the search function for a large-scale food delivery platform similar to Uber Eats. A user opens the app and types a query into a single search ...
Design a Twitter-like service
Design a simplified Twitter-like system that supports: - Users can post short messages (tweets). - Users can follow/unfollow other users. - Home timel...
Design a Payment Fraud Detection Service
Design a real-time fraud detection service for a payment platform. When a user submits a payment attempt, the platform calls your service before autho...
Design a URL Shortener
Design a URL-shortening service similar to TinyURL. The service should accept a long URL and return a short code, and later redirect requests for that...
Design an in-memory order matching engine
You are asked to design an in-memory order book / order matching system for a single electronic trading venue. The implementation language is C++, and...
Design a Real-Time Logging System
Design a logging/telemetry system for a large application platform. Requirements: - Many services send log or metric events to the system - Event subm...
Design an order-matching engine
In-Memory Limit Order-Matching Engine (Limit Order Book) Context Design and implement an in-memory, single-instrument limit order book that supports l...
Design a real-time game leaderboard
Design a real-time leaderboard for an online game. Requirements: - Players submit score updates frequently. - Query top N players globally and per reg...
Design an Online Judge and Live Comments
The onsite included two system design prompts: 1. Design an online judge platform where users submit code for programming problems. The system must su...
Design a low-latency trading system
System Design: Low-Latency Electronic Trading Platform (Equities) You are designing a single-region electronic trading platform (exchange/ATS-like) th...
Design device logging system with offline upload
Design a logging system that collects logs from many client devices, uploads them to the backend, and makes them viewable in a web UI within 3–5 minut...
Compare streaming frameworks and delivery semantics
Name popular streaming/data-processing frameworks (e.g., Kafka-based stacks, Flink, Spark Streaming, etc.). Explain at-most-once, at-least-once, and e...
Design a bank account ledger
Design a Bank Account Ledger Design a bank account ledger service for a fintech app. The system is built on an immutable, double-entry ledger so it is...
Design a mobile banking app backend
Scenario Design the backend system for a mobile banking app. Users can: - Sign up / log in - View balances and transaction history - Transfer money be...
Design a scalable web crawler
Design a Scalable Web Crawler Design a production-ready web crawler that discovers and downloads publicly accessible web pages at internet scale. The ...
Design an A/B Testing Platform
Design an internal A/B testing platform for a large consumer product. The platform should let product managers and engineers create experiments, defin...
Design a ChatGPT-like conversational assistant
Design a ChatGPT-like conversational assistant product. Assume you need to support: - Multi-turn chat with conversation history - Streaming responses ...
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 Twitter-like microblogging platform
Design a Twitter-like Platform Core interactions 1. Create/delete tweets 2. View your own tweets 3. View tweets for a given account 4. Follow other ac...