OpenAI Mobile Engineer Interview Questions

The questions to prepare for a OpenAI Mobile Engineer interview. Questions from real interview reports rank first. Updated weekly.

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CodingStart here. 26 questions · ~216 min

Thread-Safe Counter in MobileEasy

Explain how to implement a thread-safe counter in Swift or Kotlin using synchronization primitives and clean API design.

Hash TablesMathArrays

OpenAI

Managing Memory in Mobile AppsMedium

Explain how to prevent leaks, reduce retention, and manage object lifecycles in mobile apps.

Hash TablesStackArrays

OpenAI

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Metrics4 questions · ~33 min

Define Mobile Performance MetricsEasy

Tests your ability to define and instrument performance metrics for mobile user experience.

KPIsLeading IndicatorsDiagnosis

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Product Sense8 questions · ~67 min

First-Time vs Power User OptimizationMedium

Assesses your product prioritization and how you tailor UX to different user segments.

User SegmentsFeature PrioritizationUse Cases

OpenAI

Immediate Streaming AI UXHard

Assesses your product and engineering approach to perceived latency for streaming AI experiences.

User NeedsValue PropositionPain Points

OpenAI

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Behavioral & Leadership9 questions · ~75 min

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More topics3 questions · ~25 min

Ship Backward-Compatible Mobile FeaturesEasy

Explain how you would ship a mobile feature safely to a large installed base without breaking older app versions or forcing risky upgrades.

Trade-offsRisk AssessmentScope Management

OpenAI

API for ChatGPT Model AccessHard

Evaluates your approach to authorization, routing, and version control for LLM model access.

api design

OpenAI

Battery-Aware Mobile Background WorkEasy

Explain how you would design mobile background work to balance freshness, reliability, and battery impact.

Trade-offsSuccess CriteriaRisk Assessment

OpenAI

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