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 large video upload for a YouTube-like app
System Design Prompt Design the video upload subsystem for a YouTube-like product that supports large video files. Core user flow 1. User selects a la...
Design a tagging system and REST APIs
Design a tagging system (similar to tagging pages/issues) with a strong focus on REST API design. Functional requirements: - Create a tag. - Rename a ...
Design a device configuration system
Design a system for about 1,000 admin users to manage configurations for about 1,000 devices. Admins need to update device configuration every day. Ex...
Design a ride-hailing platform like Uber
You are asked to design a large-scale ride-hailing platform similar to Uber. Requirements Functional requirements - Riders can: - Sign up, log in, a...
Design an ad content delivery system with A/B testing
Design an ad content delivery (ad serving) system that selects and serves ads to users, and supports A/B testing / experimentation. Core scenario A cl...
Design a ride-sharing system like Uber
Design a ride-sharing system. Requirements: - Riders request trips with pickup/dropoff. - Drivers send frequent location updates. - Match riders to ne...
Design a large-scale web crawler
Design a web crawler that continuously discovers and downloads web pages. Requirements: - Start from seed URLs and crawl at scale. - Avoid duplicate c...
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 Food Delivery Cart
Design the backend for a shopping cart in a large food-delivery application. Users should be able to: - create or resume a cart for a restaurant, - ad...
Design Top K ranking system
System Design: Real-time Top-K from a Large/Streaming Dataset Context You receive a continuous, high-volume stream of events, each referencing an item...
Design distributed word count without MapReduce
System Design: Distributed Word Frequency Counting (No MapReduce) Context You need to design a distributed system that computes word frequencies over ...
Design a distributed multi-user counter
Design a Horizontally Scalable Distributed Counter Service Context You are designing a distributed counter service used concurrently by many clients. ...
Design a GPT chat UI with snapshots and sharing
System Design: End-to-End Web App for Interacting with a GPT-like Model Context You are designing a multi-tenant, browser-based SaaS application that ...
Design streaming difference at scale
Design a Near Real-Time Anti-Join: Stream vs. Large Reference List You are given: - list1: an unbounded, high-throughput event stream of keys (e.g., u...
Explain Go concurrency and database choices
Go Concurrency, Cross-Language Comparison, Database Trade-offs, and Storage Design Part A — Concurrency in Go 1. Explain synchronous vs asynchronous e...
Design and scale a Yelp-like platform
System Design: Yelp-like Local-Business Reviews Platform + URL Shortener You are designing two systems: 1) A Yelp-like local-business reviews platform...
Walk through a recent project design
System Design: End-to-End Project Walkthrough Provide a structured walkthrough of a recent project you led end-to-end. Organize your answer using the ...
Design scenario-based speaking feature
System Design: Scenario-Based Speaking Practice for a Multilingual Learning App Goal Design a scenario-based speaking practice feature where users sel...
Design and explain infra, K8s, routing, and fleet
System Design and Operations Deep-Dive Context: You are interviewing for a Software Engineer role with a focus on system design and engineering. Provi...
Propose and Validate a Mobile App Improvement
Assume you are working on a consumer mobile app. Propose one product improvement that could improve user engagement, retention, or conversion. Your an...