OpenAI Backend Engineer Interview Questions
The questions to prepare for a OpenAI Backend Engineer interview. Questions from real interview reports rank first. Updated daily.
Serialize a string map into bytes and deserialize it back using a length-prefixed binary format.
OpenAIImplement stable merge sort for an integer array with O(n log n) time complexity.
OpenAIImplement a simulated first-fit memory allocator with splitting, coalescing, invalid-operation handling, and fragmentation awareness.
OpenAIDesign a multi-tenant CI/CD platform that schedules and executes user-defined workflows reliably and securely.
OpenAIDesign an end-to-end ML system that retrieves, ranks, and re-ranks nearby places for search requests.
OpenAIDesign a resilient ML backend that absorbs a sudden 10x traffic surge while preserving latency, availability, and prediction quality.
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Tests ability to design efficient log analytics for identifying common request patterns.
OpenAIEvaluates performance tuning and pipeline design for low-latency backend processing.
OpenAIBuild monthly signup cohorts with CTEs and joins to calculate month 0-2 retention for a self-serve product.
Red Ventures
BILLOpenAIIdentify missing, duplicate, null, and out-of-range events across distributed streams with an index-friendly PostgreSQL query.
OpenAICalculate daily cohort retention and ninety-day rolling retention using PostgreSQL window functions.
OpenAI
Canva