Software Engineer System Design Interview Questions
Practice 1,082 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 searchable status & geolocation services
Design searchable status & geolocation services System Design: Searchable Short-Form Status Updates with Nearby Search Context Design a microblogging ...
Design a meeting scheduler with cancellations
Design a meeting scheduler with cancellations System Design: Meeting Scheduling Platform (Onsite) Context Design a multi-tenant meeting scheduling sys...
Design and evolve a reservation system
Design and evolve a reservation system System Design: Online Reservation System You are designing a backend platform to book time-based slots for serv...
Design an e-commerce price tracking service
Design a backend system for an e-commerce price-tracking service. Users can track products from a large online retailer, view historical prices, and r...
Design a Support Ticket Processing System
Design a support ticket processing system similar to ServiceNow. `hint Hint 1 Start by stating assumptions, then work from requirements to trade-offs ...
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 64-bit distributed IDs and a parking lot
You have two system-design prompts. 1) 64-bit database ID generator Design a service/library that generates globally unique 64-bit integer IDs for dat...
Design a high-scale URL shortener
This question evaluates a candidate's ability to design scalable, high-throughput distributed systems with emphasis on URL mapping, storage and indexi...
Design a pipeline orchestration system on Kubernetes
This question evaluates a candidate's ability to design scalable, highly available pipeline and workflow orchestration systems on Kubernetes, emphasiz...
Design an async job system and cache layer
This question evaluates system design competencies including asynchronous job orchestration, reliable background processing (state transitions, retrie...
Design a file sync and sharing service
This question evaluates system design competency, covering distributed storage architecture, synchronization protocols, conflict resolution and versio...
Design an async API with idempotency
This question evaluates a candidate's competency in designing asynchronous HTTP APIs with idempotency guarantees, focusing on job lifecycle, durable d...
Review an existing architecture for risks
This question evaluates an engineer's ability to perform an architecture review, identifying imminent scalability, reliability, operability, and secur...
Design an access control system (RBAC + resource-based)
Design an authorization system that supports both: - Role-Based Access Control (RBAC): users/groups have roles (e.g., Admin, Editor, Viewer) that gran...
Store a hierarchy and return all children
Design a service to store a hierarchical tree of nodes and expose APIs. Requirements: - Persist a hierarchy (a forest with multiple roots is acceptabl...
Design Stock Price Alerts
Design a stock price alert system that allows users to create alerts for securities and receive notifications when the market price crosses a specifie...
Design a Market Surveillance Platform
Design a customer-facing market surveillance platform for financial exchanges. Financial exchanges submit trading orders to the platform. An example o...
Design weekly comment digest
Design a service that sends a weekly email digest of the top comments on each post to the post owner. Requirements: - Posts receive comments throughou...
Design ticketing system with seat hold
Design an online ticketing system (similar to Ticketmaster) that allows users to browse events, select seats, and place a temporary 5-minute hold on s...
Design an online chess game with undo and leaderboard
This question evaluates proficiency in real-time system design, state management, and concurrency control for multiplayer games, including consistency...