Interview Reports

OpenAI — Interview Q&A — MLE / research track (separate loop — PhD, Pass, referral, onsite)

OpenAI — Interview Q&A — Sora SD — onsite emphasis: CHECKPOINTING & fault-tolerance (from a VO writeup)

OpenAI — Interview Q&A — ROUND 2 — Algorithm: "Plant Infection" (植物感染), 5 parts (only first 4 graded)

OpenAI — Interview Q&A — ROUND 1 — System Design: "Design Sora" (really: a task scheduler)

OpenAI — Interview Q&A

OpenAI — Question Bank — Infection Spread — full canonical spec (Very High, last asked 2026-05-16, phone screen)

OpenAI — Question Bank — SYSTEM DESIGN (16)

OpenAI — Question Bank — CODING (26) — by frequency

OpenAI VO Onsite: Design Sora (Job Scheduler) with Focus on Failure Handling and GPU Fault Tolerance

OpenAI MLE Onsite Experience: Transformer Debugging, Cell Simulation, and Post-Training (Pass)

OpenAI Phone Screen: Infection Spread (BFS) - 5 Parts, Double-Buffering Critical

OpenAI Technical Deep Dive: Slide-Based Project Review

OpenAI Behavioral: Recruiter/HR Screen

OpenAI Behavioral: Why OpenAI / AI Safety / AGI (HM Round)

OpenAI System Design: Multi-Tenant CI/CD

OpenAI System Design: Distributed Crossword Solver

OpenAI System Design: Chess.com

OpenAI System Design: RAG / Search ML Design (Oral)

OpenAI System Design: Slack Clone

OpenAI System Design: POI System / Yelp

OpenAI System Design: GPT-3 Playground Full-Stack

OpenAI System Design: AI Chatbot System (Frontend-Heavy)

OpenAI System Design: Mining Novel Data from Unlabeled Corpus

OpenAI System Design: Webhook Delivery System

OpenAI System Design: URL Shortener

OpenAI System Design: Google Calendar

OpenAI System Design: ChatGPT Enterprise (RAG)

OpenAI System Design: Cloud IDE

OpenAI System Design: Sora/Video Gen Pipeline (New/Rising)

OpenAI System Design: Payment/Coffee Shop Ordering (High Freq)

OpenAI Coding: Distributed Machine Cluster Count & Topology

OpenAI Coding: In-Memory Database w/ SQL

OpenAI Coding: Durable KV Store Serialization

OpenAI Coding: Chat Bot System Refactoring

OpenAI Coding: Resumable Iterator (Multi-Dim)

OpenAI ML Coding: Code Reading - 400-line PyTorch Refactor

OpenAI Coding: Shard Rebalance / Overlapping Key Range

OpenAI RS Coding: Math Reasoning - Stopping Time / Las Vegas

OpenAI Coding: Time-Based KV Store + Production Testing

OpenAI Coding: OpenSheet Spreadsheet with Cell Deps

OpenAI Coding: Implement a `cd` Command

OpenAI Infra Coding: ModalLock / FairModalLock

OpenAI Coding: Streaming Entropy

OpenAI Coding: Monster Battle System (OOD)

OpenAI Coding: Memory Allocator (Hard)

OpenAI Coding: Toy Language / Type Inference

OpenAI Coding: Version Dependency Resolver

OpenAI ML Coding: Classifier with Noisy Annotators

OpenAI ML Coding: NumPy 1-NN to Wx+b Network

OpenAI ML Coding: Autograd / Manual Backprop + Hillis-Steele Scan