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 an Audio Identification Service
Design a service that identifies a recorded song from a short, noisy audio sample. The system stores a catalog of reference tracks. A client uploads o...
Design GPU Scheduling for a Video Generation Platform
Prepare for a OpenAI system design interview about design gpu scheduling for a video generation platform. This question focuses on requirements, archi...
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 Interviewer Availability and Atomic Booking APIs
Design Interviewer Availability and Atomic Booking APIs Design a relational schema and three APIs for interview scheduling: interviewers mark availabl...
Design a One-on-One Chat Service
This question evaluates the ability to design a scalable, real-time one-on-one messaging service, probing distributed systems concepts, data modeling,...
Design a Stateful Outreach Campaign Engine
Design an internal campaign engine that lets an agent select a custom subset of clients and start an outreach campaign for each selected client. For e...
Design a Scalable File Upload and Content Extraction Pipeline
Design an asynchronous file-upload and content-extraction system for a language-model workflow, including APIs, storage, queues, workers, retries, and...
Design a Job Scheduler That Can Scale by 100 Times
Design a job scheduler that initially serves a small workload but must later handle 100 times as many jobs. Clients submit one-time jobs with executio...
Design a scalable expense rules engine
Design a Rules Engine for Corporate Credit-Card Expense Review Context We offer a corporate credit card that employees use for business expenses. Mana...
Design a single-node persistent in-memory cache
Scenario Design a single-machine in-memory cache used by a web service to serve concurrent read and write requests. This is a deliberately low-level s...
Scale Duplicate File Detection
This question evaluates system-design, performance-diagnosis, and distributed-systems competencies, focusing on identifying bottlenecks through measur...
Design and Implement a URL Shortening Service
Design and implement a URL shortening service in a combined whiteboarding and implementation interview where AI assistance may be allowed. `hint Hint ...
Design a Reliable Distributed Job Scheduler
Design a distributed scheduler for one-time and recurring jobs with pause, resume, cancellation, retries, and multi-tenant fairness. Address durable l...
Object-Oriented Design: Hotel Room Booking System
Object-Oriented Design: Hotel Room Booking System Design the object model and core service for a hotel room booking system. The service must let a cli...
Design an Automated Jira-Ticket-to-PR System
This system design question evaluates expertise in distributed systems, asynchronous job processing, and queue-based architecture. It tests practical ...
Design a Chat Application with a Partitioned Cache
Design a Chat Application with a Partitioned Cache Design an end-to-end chat application that supports direct conversations and small group conversati...
Design a Food-Delivery Backend (Uber Eats-style)
This system design question tests a candidate's ability to architect a large-scale, multi-actor backend involving geospatial matching, real-time data ...
Design a Notebook App That Synchronizes Notes
Design a Notebook App That Synchronizes Notes Design a web notebook application in which users can create and edit notes and automatically synchronize...
Design A Low-Latency Holiday Lookup Service
Prepare for a system design prompt about making a holiday lookup API much lower latency when data comes from a downstream service. The question focuse...
Design a Secure PDF Data Room
This question evaluates a candidate's mastery of system design and secure authorization models for multi-tenant file-sharing platforms, focusing on or...