OpenAI Software Engineer System Design Interview Questions
Practice 56 real System Design interview questions for Software Engineer roles at OpenAI.
"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 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 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 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...
Design GPU Scheduling for a Video Generation Platform
Design GPU scheduling for a video generation platform where requests have different durations, priorities, and capacity needs. <details> <summary>Hint...
Design an Offline Merchant Payment System with Reconciliation
Design an offline merchant payment system with authorization, capture, ledgering, and reconciliation with acquiring banks. <details> <summary>Hint 1</...
Design an Instagram-like Feed System
Design an Instagram-like photo-sharing application, focusing on feed generation and delivery. Your design should support: - Users creating posts conta...
Design a Payment Processing System
Design a Payment Processing System Design the backend payment system for an application that charges users for purchases. A client (web/mobile checkou...
Design a Slack-Like Messaging System
Design a Slack-like team messaging system focused on sending and receiving messages in real time. Your design should support workspaces with channels ...
Design CI/CD Build Caching
You are given a simple CI/CD platform. Users submit workflow definitions in YAML. A workflow contains multiple jobs, and for this exercise the jobs ru...
Design Online Chess Matchmaking
Design the backend architecture for an online chess platform's matchmaking system. Players submit requests to play ranked or casual chess games. A req...
Design a Distributed Crossword Solver
Design a Distributed Crossword Solver Design a distributed system that solves crossword-like word puzzles at scale. You are given a rectangular grid o...
Design a Payment Processing Service (Merchant to Payment Provider)
You are designing the backend payment processing service that sits between online merchants and external payment providers (card networks and issuing/...
Design a sandboxed cloud IDE
System Design: Sandboxed Cloud IDE (Colab-like) Design a multi-tenant, browser-based cloud IDE/notebook that lets users run code inside an isolated sa...
Design a crossword puzzle solver system
Design a crossword puzzle solver Design a system that can solve a crossword puzzle. Inputs - A 2D board grid: - Some cells are blocked (black square...
Design GPU credit allocator
Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...
Design a Distributed Crossword Solver
Design a scalable, distributed service that solves crossword-style fill-in puzzles. A request contains a rectangular grid with blocked cells, empty ce...
Design a Cloud DevBox Platform
Design a cloud DevBox platform: a service that gives developers disposable or persistent remote development machines, accessible through a browser, SS...
Prevent Duplicate Request Processing
A client accidentally sends the same network request twice, for example because the user double-clicked a button, the client retried after a timeout, ...
Design a Hosted Notebook Platform
Design a hosted notebook platform for interactive code execution — a cloud-based notebook service in the spirit of Google Colab, Deepnote, or Hex — wh...