Openai Software Engineer Interview Questions
OpenAI Software Engineer interview questions typically probe both classic engineering fundamentals and how you apply them in a research-driven, safety-conscious environment. What’s distinctive is the strong emphasis on mission alignment, clear technical communication, and the ability to reason about tradeoffs in complex ML systems; interviews commonly evaluate algorithmic problem solving, system design, code quality, and a technical deep dive into past projects. You should expect a mix of pair-coding or timed coding assessments, one or more domain-focused technical interviews, and behavioral discussions that assess collaboration, ownership, and ethical reasoning. For effective interview preparation, balance algorithm and data-structure practice with system-design thinking and a polished narrative about your projects. Familiarize yourself with OpenAI’s public research, blog posts, and the company’s charter so you can discuss how your work would fit the mission. Practice articulating design tradeoffs, writing clear, testable code under time pressure, and presenting a technical deep dive of a past project with measured outcomes. Recruiters often share format details and prep pointers, so use those to tailor your study and mock interviews.
Implement an in-memory SQL-like table
Problem Implement a simple in-memory database for one table. All values are strings. Each row is identified by a rowKey (string). Each row contains co...
Implement credit ledger with out-of-order timestamps
Problem You are implementing a GPU credit ledger that supports adding credits, charging credits, and querying balances. Requests can arrive in any tim...
Implement toy-language types and generic substitution
Problem: Toy Language Type System (Printing + Generic Resolution) You are implementing a small type system for a custom “Toy Language”. Types can be: ...
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 system with live log streaming
System Design Prompt: CI/CD Platform (shell-script jobs) Design a CI/CD system that can: 1. Allow users to define pipelines consisting of multiple job...
Implement a persistent sharded key-value store
Problem Implement a simple key–value store that persists data on disk. You must store the data in fixed-size shards, where each shard is saved in one ...
Implement map serialization and deserialization
You are given an in-memory map (dictionary) from strings to strings. Implement two functions: - string serialize(map<string, string> m) - map<string, ...
Simulate turn-based monster team battle
Design an object-oriented model and implement the core battle logic for a turn-based fight between two teams of monsters. The system should simulate t...
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...
Implement IPv4 iterators and CIDR expansion
Problem: IPv4 Iterators and CIDR Expansion You are implementing utilities to iterate over IPv4 addresses. An IPv4 address is in dotted-decimal form: A...
Design a social network with snapshots
You are asked to design and implement an in-memory SocialNetwork class that supports users following each other and creating snapshots of the follow g...
Design a distributed crossword solving service
You are asked to design a backend service that can solve crossword puzzles at scale. A single puzzle instance consists of: - A crossword board (grid) ...
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 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...
Implement and Debug Backprop in NumPy
Two-Layer Neural Network: Backpropagation and Gradient Check (NumPy) Context You are implementing a fully connected two-layer neural network for multi...
Implement a Simulated Memory Allocator
Implement a simulated memory allocator that supports allocate(size) and free(ptr) operations analogous to malloc and free. Treat memory as a contiguou...
Explain your perspective on AI safety
You are working in a company that builds and deploys advanced AI systems (e.g., large language models, recommendation systems, vision models) that are...
Design a URL shortening service
Design a scalable backend service for shortening URLs (similar to popular URL shortener products). Describe a system that supports at least the follow...
Design a multi-device calendar application
System design prompt Design a calendar application similar to Apple Calendar. Core features - Users can create, update, and delete events. - The UI mu...
Implement an expiring GPU-credit manager
Implement an expiring GPU-credit manager for a cloud provider. Each user receives credit grants with an amount and an expiration timestamp. Support: (...