Openai Software Engineer System Design Interview Questions
Practice the exact questions companies are asking right now.
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"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 sandboxed cloud IDE
System design: Sandboxed cloud IDE (Colab-like) Design a multi-tenant, browser-based cloud IDE/notebook that lets users run code in an isolated sandbo...
Design a payment system with holds and batching
Scenario Design a payment system that supports: 1. Hold payment (authorization): Place a temporary hold on a customer’s payment method for a given amo...
Design a Hosted Notebook Platform
Design a hosted notebook platform for interactive code execution, similar to a cloud-based notebook service. The system must support 500,000 concurren...
Design a Distributed Crossword Solver
Design an online service that solves crossword-like word puzzles. A user submits a puzzle description that includes the grid layout, blocked cells, an...
Design an AI playground editor
Design a full-stack AI playground web application similar to a chat product, but with one document-like component that interleaves user prompts and mo...
Design a Slack-like real-time messaging system
System Design: Slack-like Messaging (DMs + Channels) Design a Slack-like real-time messaging system that supports: Core features - Direct Messages (DM...
Design a scalable payment system
Design a payment system that supports moving money between users and paying merchants. Your design should cover: - Core product requirements: user-to-...
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 a distributed crossword fill solver
Scenario You are building a service that fills a crossword-like grid with words. - The board size is not specified; assume a medium board around 50×50...
Design GPU credit allocator
System Design: GPU Credits Allocation and Fair Usage Context You are designing a multi-tenant platform that provides access to GPU compute across many...
Design a CI/CD system with stuck-job handling
Scenario Design a CI/CD platform similar to GitHub Actions/Jenkins that: - Triggers pipelines on events (e.g., push/PR/merge). - Runs pipelines as a D...
Design a payment processing system
Scenario Design a backend payment system for an online product that supports: - One-time charges and refunds. - Idempotent payment APIs (clients may r...
Design a CI/CD pipeline with scheduler
System Design: Production‑Grade CI/CD for a Large Microservices Monorepo Context You’re designing a scalable, secure CI/CD platform for a large monore...
Design a ChatGPT-like web chat UI
Scenario You are interviewing for a front-end role. Design a web application similar to a ChatGPT chat experience. The interviewer expects a front-end...
Design a payment system
Design a payment system for an online commerce platform. The system should support: - Creating a payment order for a purchase - Authorizing and captur...
Design a URL Shortener
Design a URL shortening service similar to Bitly. The system should: - Accept a long URL and generate a short, unique alias. - Redirect users from the...
Design a Conversational AI Assistant
Design a large-scale conversational AI product similar to ChatGPT. Users should be able to: - start a new conversation, - send prompts, - receive stre...
Design reliable high-volume chatbot system
You are designing the backend for a chatbot / AI assistant service (similar to a support bot or meeting assistant). Many users may send messages at th...
Design a GPU credit allocation service
Design a Multi‑Tenant GPU Credit Allocation Service Context You are designing a multi-tenant platform where organizations run GPU jobs. Each organizat...
Design in-memory database API
In-Memory Database: Insert, Query, and Indexing Context You are to design a minimal, single-process, in-memory database to be embedded in a service. T...