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 a Personalized Weekly Deals Service
Design a Personalized Weekly Deals Service Design a service that ingests deals weekly from several pipelines. Each deal has a start and end time and c...
Design Peer-to-Peer Model Distribution Under a Shared Link Cap
Design Peer-to-Peer Model Distribution Under a Shared Link Cap Design a system that distributes one large model artifact from a machine that already h...
Design a Payment Orchestration System
Design a Payment Orchestration System Design the merchant-side service that coordinates payment authorization, capture, refund, and status tracking th...
Design an Online Chess Service from Launch to Scale
Design an Online Chess Service from Launch to Scale Design an online chess service. Players enter matchmaking, are paired into games, exchange legal m...
Design an Asynchronous Text-to-Video Generation Service
Design an Asynchronous Text-to-Video Generation Service Design a service in which a user submits a text prompt, the system performs a long-running vid...
Design a Prompt Sharing Product
Design a Prompt Sharing Product The source separately reports a product-design interview about prompt sharing, including user flow, database schema, s...
Design a Task Scheduler for Opaque Long-Running GPU Jobs ("Design Sora")
This system design question evaluates a candidate's ability to architect a distributed job scheduler and orchestrator for expensive, long-running, GPU...
Design a prompt playground
Design a prompt playground for developers and prompt engineers. The product lets users write prompts, choose model settings, run prompts against AI mo...
Design a Read- and Write-Heavy Product Catalog Service
Design a Read- and Write-Heavy Product Catalog Service Design a service in which merchants create and update product listings while users browse and v...
Design a Website Monitoring Service
Design a website monitoring service that checks customer websites, detects outages or high latency, and alerts users when their sites fail health chec...
Design an Idempotent Double-Entry Ledger
Design a ledger service that records financial transactions using double-entry accounting. Clients submit operations over an unreliable network and ma...
Design a Payment-Count Dashboard That Scales with Readers and Updates
Design a Payment-Count Dashboard That Scales with Readers and Updates Design a service that displays the total number of payments made on an administr...
Design a Distributed Rate-Limiting Service
Design a Distributed Rate-Limiting Service Design a rate-limiting service that protects APIs across many application instances. It should support per-...
Design Direct File Uploads for a Chat Application
Design Direct File Uploads for a Chat Application Design file uploads for an existing chat application. Clients should upload file bytes directly to a...
Design a Centralized Logging System
Design a Centralized Logging System Design a system that collects application logs from a large fleet of microservice instances and makes them durable...
Design a Superhero Dispatch System
Design the backend for a superhero rescue marketplace — a dispatch platform that connects civilians in distress with nearby superheroes. Civilians rep...
Design a Distributed Key-Value Store
This system design question evaluates the ability to architect a horizontally scalable distributed key-value store, covering data partitioning, replic...
Design an Online Book Seller Platform
Design an Online Book Seller Platform Design a service for browsing and searching books, managing inventory, placing orders, taking payments, and trac...
Design a Smooth Per-Customer Calls-Per-Second Controller
Design a Smooth Per-Customer Calls-Per-Second Controller Design a service that controls outbound calls for many customers. Each customer has a configu...
Design a Fair GPU Training Job Platform
Design a Fair GPU Training Job Platform Design a platform where machine-learning engineers submit one-off GPU training jobs. The platform must allocat...