RejectedOnsite

ChatGPT System Design, Vector Store and a Scheduler Debugging Round, Rejected

OpenAISoftware Engineer · Onsite · Jul 2026

SWE VO System design: design ChatGPT. At first the interviewer said not to worry about scale and no need to persist anything. Later they asked why use SSE instead of WebSocket, and also asked how to optimize the frontend so that long conversations can still render well. Coding: all new questions I had never seen. I used Python. Vector Store The problem is to implement a simplified vector store th…

Shared by a candidate · reported Jul 2026. Interview formats change; use it as a guide, not a script.