Software Engineer System Design Interview Questions
Practice 962 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 News Aggregation System (Google News-style)
Design a large-scale news aggregation service similar to Google News. The system continuously discovers and crawls news articles from tens of thousand...
Design a Thread-Safe Buffered Writer with a Background Flush Thread
Design a Thread-Safe Buffered Writer with a Background Flush Thread Design a reusable in-process component — call it BufferedDiskWriter — that many ap...
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 the GPU Job Scheduler for a Text-to-Video Generation Service
Design the GPU Job Scheduler for a Text-to-Video Generation Service You are designing the backend that runs generation jobs for a large text-to-video ...
Design a Distributed Rate Limiter
Design a distributed rate limiting system for a large API platform. The platform runs many API gateways and backend services across multiple regions. ...
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 an LLM Request Batching System
Design an LLM Request Batching System A model-inference service sits in front of a fleet of GPUs. Each individual user request carries one input strin...
Design a User Behavior Tracking (Clickstream Analytics) System
Design a user behavior tracking system for a web and mobile product. The system captures user interaction events, transports them reliably, processes ...
Design a Food-Delivery Backend (Uber Eats-style)
Design the backend for a food-delivery platform like Uber Eats. A customer opens the app, browses nearby restaurants, places an order from a menu, pay...
Design a Food Rating System
Design a rating and review system for a food delivery marketplace (e.g. DoorDash). Users of the system should be able to: - Rate a food item on a fixe...
Design a One-on-One Chat Service
Design a scalable one-on-one (1:1) chat service. The service lets registered users exchange private text messages in real time across web and mobile c...
Design a Distributed Rate Limiter
Design a Distributed Rate Limiter Design a rate limiter that enforces a per-client request quota (for example, "at most 100 requests per minute per AP...
Design a Payment Processing System with Exactly-Once Charging
Design a Payment Processing System with Exactly-Once Charging You are designing the core payment service for a marketplace platform. When a buyer chec...
Design a Task Scheduler for Opaque Long-Running GPU Jobs ("Design Sora")
Design a task scheduler that runs long-running, opaque video-generation jobs at scale (the "Design Sora" prompt). Your platform lets users submit a te...
Design Video Generation Orchestration
Design a scalable system to orchestrate AI video generation (think Sora-style text-to-video). Users submit text prompts to generate videos. For each s...
Prevent Duplicate Payments Under High Load
Prevent Duplicate Payments Under High Load You are designing the payment-processing service for a company that charges customers' cards (e.g. a payrol...
Design a Venue Rental and Booking System (HLD)
Design a venue / facility rental system that lets organizers — schools, clubs, and event organizers — discover and rent out physical venues. Venues ar...
Design Multi-Dimensional Request Rate Limiting
Design a rate limiter for a backend service that runs across multiple application servers. The system must decide, for every incoming request, whether...
Design a Prompt Playground
Design a Prompt Playground (ChatGPT / Claude Playground) Design a "prompt playground" web product: an interactive surface where a developer types a pr...
Design a Geolocation Search Service
Design a geolocation search service that returns relevant places or entities near a user. <details> <summary>Hint 1</summary> Start by stating assumpt...