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 personalized news aggregation service
System Design: Personalized News Aggregation Service Design a large-scale news aggregation system similar to Google News or other news aggregator prod...
Design a cloud-based global property rental platform
System design: Cloud migration for a property rental website A property dealer runs a website that lists properties (photos, location, rent details). ...
Design an S3-like Object Store
Design a highly durable object storage service similar to Amazon S3. Users can create buckets and upload, download, list, and delete objects by key. T...
How would you scale rule evaluation?
Assume the same expense-policy rule engine must now support up to 1,000,000 active rules and efficiently evaluate batches of around 1,000 expense reco...
Design a Multi-Agent Chat Backend
Design the backend for an LLM-powered chat product used by customers in a financial-technology setting. The interviewer will show a simple demo of a c...
Design appointment scheduling data model and APIs
Scenario You are extending an existing healthcare system that already has User and Patient management APIs. - Doctors and Staff are Users. - Patients ...
Design a Ticketmaster-like ticketing system
System Design Prompt Design an online event ticketing platform (Ticketmaster-like) that allows users to: 1. Browse/search events and view seat maps (o...
Design and evolve a reservation system
System Design: Online Reservation System You are designing a backend platform to book time-based slots for services or events (e.g., appointments, cla...
Design a global notification service
System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification platform that delivers real-time and sc...
Design banking with scheduled transfers and merges
In-Memory Banking System with Scheduled Payments and Account Merges Design and implement a single-threaded, in-memory banking system that supports sch...
Design an hourly weather crawling service
Scenario Design a service that crawls the U.S. National Weather Service (or a similar public provider) and provides hourly weather data to internal co...
Design a real-time favorites service at scale
Design: Real-Time Favorites/Unfavorites Service at High Scale Context Design a backend service that lets users favorite/unfavorite items (e.g., posts,...
Scale Digit-Square Convergence Requests
Design a service that receives very high request volume for the digit-square convergence operation. For each request, the input is a positive integer ...
Design core bank operations
Design a BankSystem Class (Take‑home Project) Goal Design and document a BankSystem class that supports three operations: - createAccount(timestamp, c...
Design aggregator for multiple downstream services
Design a backend service for a large retailer (similar to Walmart) that must call many downstream services to fulfill a single user request. When a cl...
Review tech stack and best practices
Take-home Technical Questionnaire (System Design & Engineering) Context As part of a take-home technical screen for a Software Engineer role, provide ...
Design a scalable tagging system
Design a scalable, multi-tenant tagging system that lets users attach multiple tags to arbitrary resources ("items") and query them efficiently. The s...
Implement debounced autocomplete component
Implement an Autocomplete Input Component Context Build a reusable web UI component that provides typeahead autocomplete for user input. Assume a mode...
Design highly available blob storage service
Design a large-scale, highly available blob storage service similar to Amazon S3. The service should allow clients to store, retrieve, and delete arbi...
Diagnose failures via SSH and large logs
Troubleshooting Large Logs Over SSH and Designing Centralized Logging Context You are on-call for a production service that is failing. You have SSH a...