Software Engineer System Design Interview Questions
Practice 1,093 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 Scalable Post, Feed, and Search Service
Design a Scalable Post, Feed, and Search Service Design a social-post service with three core capabilities: a user can publish a text post, retrieve a...
Design a payment system with holds and batching
This question evaluates a candidate's competency in designing reliable, auditable payment workflows, covering authorization holds, batch settlement, i...
Design a scalable URL shortener with expiration and security
System Design: URL Shortening Service at Internet Scale You are asked to design a URL shortening service for hundreds of millions of users with high a...
Design a TinyURL-like short link service
Design a TinyURL-like service that generates short URLs and redirects users to the original long URLs. Requirements: - Provide APIs to create a short ...
Define a Git workflow for CI
Define a Git workflow for CI Design a Git Branching and Release Strategy for a Graphics Testing Repository Context You are designing the source contro...
Design limited-time donation platform
Design limited-time donation platform System Design: Donations Platform for a Three-Day Global Fundraising Campaign Context You are to design an inter...
Design an online auction system
Design an online auction system System Design: Real-Time Online Auction Platform You are asked to design an online auction system that supports real-t...
Design an online chess platform
Design an online chess platform. Requirements: - User matchmaking (ranked/unranked). - Real-time gameplay with low latency moves. - Enforce game rules...
Design a YouTube/Netflix video platform
Design a video platform similar to YouTube/Netflix. Requirements: - Upload videos (for YouTube-like) and/or ingest catalog (for Netflix-like). - Trans...
Design a chat messaging system
Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...
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...
Debug and optimize React performance issues
Debug and optimize React performance issues React Debugging and Performance Assessment Background You're reviewing a React single-page application dur...
Design Thread-Safe Tagging and Bookstore Systems
Design Thread-Safe Tagging and Bookstore Systems System Design and OO Design (Onsite) Part 1: Thread-Safe Document–Tag Design Design object-oriented c...
Design UberPool matching with zero Manhattan detour
Design a ride-sharing (UberPool-like) system focused on matching and routing. You are operating on a grid where travel distance is Manhattan distance:...
Design a metrics monitoring system
Design a metrics monitoring system System Design: Metrics Monitoring Platform Context Design a cloud‑native, multi‑tenant metrics monitoring system fo...
Design a pickup-area driver queue
Design an internal service for a ride-hailing company that maintains a driver queue for each pickup area, such as an airport pickup zone or staging lo...
Design e-commerce browse/search
Design e-commerce browse/search System Design: Category Browsing and Product Search for an E‑commerce Platform Context You are designing the category ...
Compare RDBMS and NoSQL trade-offs
Compare RDBMS and NoSQL trade-offs RDBMS vs. NoSQL: Compare and Recommend Context You are designing a production backend service and must choose betwe...
Explain HTTP methods and your usage
Explain HTTP methods and your usage HTTP Methods, Idempotency, Safety, and Practical Use Context You design and consume RESTful APIs for high-throughp...
Design real-time exchange data sync system
Design real-time exchange data sync system System Design: Real-Time Multi-Exchange Stock Data Ingestion and Live Web Page Context You are asked to des...