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
DevOps Engineer
•
System Design
•
hard
Design a distributed checkpointing system for large-scale model training that needs to write terabytes of state data every 10 minutes without blocking GPU execution.
#Distributed Systems
#Storage
#High Throughput
#GPU Infrastructure
DevOps Engineer
•
System Design
•
hard
Design a high-throughput, low-latency API gateway for LLM inference that handles streaming responses (e.g., Server-Sent Events).
#API Gateway
#Load Balancing
#Streaming
#WebSockets/SSE
DevOps Engineer
•
System Design
•
hard
Design an auto-scaling system for inference nodes based on custom metrics like queue depth and GPU memory fragmentation, rather than just CPU usage.
#Auto-scaling
#Custom Metrics
#KEDA
#Capacity Planning
DevOps Engineer
•
System Design
•
medium
Design a highly available internal DNS architecture for a multi-region cloud environment that supports millions of internal queries per second.
#DNS
#Networking
#High Availability
DevOps Engineer
•
System Design
•
hard
Design a centralized logging architecture capable of ingesting petabytes of logs per day from distributed inference servers with sub-minute search latency.
#Logging
#Big Data
#Elasticsearch
#Kafka
DevOps Engineer
•
System Design
•
hard
Design a system to securely distribute multi-gigabyte model weights to thousands of edge inference nodes globally with minimal latency and network cost.
#Content Delivery
#Peer-to-Peer
#Security
#Edge Computing
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.