OpenAI interview questions

Design a Payment Processing Service (Merchant to Payment Provider)

Companies: OpenAI

Distributed Transactions & Idempotency · Payments & Ledgers · System Design

Last reported Jun 2026

Design Video Generation Orchestration

Companies: OpenAI

Distributed Transactions & Idempotency · Job Scheduling & Workflows · System Design

Last reported Jun 2026

Add Consecutive-Value Bonuses to Grid Paths

Companies: OpenAI

Last reported Jun 2026

Find and Count Maximum-Score Grid Paths

Companies: OpenAI

Dynamic Programming · Grids & Matrices

Last reported Jun 2026

Spreading Contagion on a Grid

Companies: OpenAI

Last reported Jun 2026

In-Memory Database: Implement SQL-Like Operations

Build an in-memory database that supports basic SQL-like operations including insert, query with WHERE clauses, and ORDER BY functionality. Implement efficient data storage…

Companies: OpenAI, Anthropic, Two Sigma

Last reported Jun 2026

Design Slack

Design a messaging platform like Slack that supports real-time messaging through direct messages and channels (public/private), message threads, new message indicators, and…

Companies: OpenAI, Coinbase, Databricks

Last reported Jun 2026

Aggregate Recent Message Events And Active Chats

Companies: OpenAI

Data Structure Design

Last reported Jun 2026

Implement A Contiguous Memory Allocator With Free-Block Coalescing

Companies: OpenAI

Data Structure Design · Memory Management

Last reported Jun 2026

Streaming Entropy with Numerical Stability

Companies: OpenAI

Last reported Jun 2026

Monster Fight

Implement a system to simulate combat between monsters with different attributes and abilities. Design the logic to handle turn-based fighting mechanics and determine the winner.

Companies: OpenAI

Last reported Jun 2026

Present a project that you worked on previously. bring diagrams but not too in depth

Companies: OpenAI

Last reported Jun 2026

Rotting Oranges

Given an m×n grid with empty cells, fresh (1) and rotten (2) oranges, compute the minimum minutes until all fresh oranges become rotten as rot…

Companies: OpenAI, Amazon, Anduril, Flipkart +3

Array · Breadth-First Search · Matrix

Last reported Jun 2026

Implement a Simple Memory Allocator

Companies: OpenAI

Data Structure Design · Memory Management

Last reported May 2026

Design a system from your own experience

Present and walk through the design of a real system you have previously worked on, explaining your architectural decisions, trade-offs, and how you addressed key…

Companies: OpenAI, Amazon, Microsoft, Oracle +1

Last reported May 2026

Simple Bank System

Design a Bank class that maintains 1-indexed account balances and supports transfer, deposit, and withdraw operations; each operation must validate account indices and (for…

Companies: OpenAI, Capital One, Coinbase, Okta +1

Last reported May 2026

Design CI/CD Build Caching

Companies: OpenAI

Caching · CI/CD & Deployment · System Design

Last reported May 2026

Design a distributed rate limiter

Algorithm trade-offs (fixed window, sliding log, sliding counter, token bucket), placement, distributed atomic counting, failure modes.

Companies: OpenAI, Amazon, Anthropic, Apple +14

api-gateway · atomicity · Concurrency · Consistency & Availability

Last reported May 2026

Design an Instagram-like Feed System

Companies: OpenAI

Messaging & Event-Driven · Search & Feed Systems · System Design

Last reported May 2026

Compute Plant Infection Time

Companies: OpenAI

Last reported May 2026

Design Online Chess Matchmaking

Companies: OpenAI

Distributed Coordination · Multiplayer Game Systems · System Design

Last reported May 2026

How did you present technical findings to stakeholders or your team?

Describe how you presented a project's technical findings and outcomes to stakeholders or your team. How did you tailor your communication to different audiences?

Companies: OpenAI

Last reported May 2026