OpenAI
Leading AI research laboratory developing state-of-the-art foundation models like GPT-4.
5 Rounds
~21 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Cloud Engineer
•
System Design
•
hard
Design a system to provision, manage, and monitor a cluster of 10,000 GPUs on Azure for a massive LLM training run. How do you handle node failures gracefully without restarting the entire training job?
#Azure
#Kubernetes
#GPU Orchestration
#Fault Tolerance
Cloud Engineer
•
System Design
•
hard
Design an auto-scaling architecture for the ChatGPT inference API that experiences sudden, massive spikes in traffic. How do you scale stateful workloads like KV-cache across multiple regions?
#Auto-scaling
#Load Balancing
#Distributed Systems
#Inference
Cloud Engineer
•
System Design
•
hard
Design a rate-limiting service for the OpenAI API that can handle sudden, massive viral spikes in traffic across multiple global regions.
#Distributed Systems
#API Gateway
#Redis
#Concurrency
Cloud Engineer
•
System Design
•
hard
Explain how you would design the infrastructure to serve a large language model like GPT-4, ensuring high availability and low latency for global users.
#GPU Orchestration
#Load Balancing
#High Availability
#Inference
Cloud Engineer
•
System Design
•
hard
Design a telemetry and observability system capable of ingesting and querying metrics from 100,000+ GPUs in real-time.
#Observability
#Prometheus
#Time-Series Databases
#Scaling
Cloud Engineer
•
System Design
•
hard
Design a distributed caching layer for LLM embeddings that allows fast nearest-neighbor lookups across billions of vectors.
#Vector Databases
#Caching
#Distributed Systems
Cloud Engineer
•
System Design
•
medium
Design a scalable CI/CD pipeline for a massive monorepo containing both infrastructure code and machine learning models.
#CI/CD
#Monorepo
#Bazel
#Automation
Cloud Engineer
•
System Design
•
hard
Design a system to securely stream massive training datasets (petabytes of data) from cloud storage to thousands of GPU nodes in real-time.
#Storage
#Throughput
#Distributed Systems
Cloud Engineer
•
System Design
•
hard
Design a multi-region active-active deployment architecture for the OpenAI API to ensure 99.99% uptime.
#High Availability
#Global Routing
#Database Replication
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.