Ios Engineer, Chatgpt Mobile Infrastructure

OpenAI OpenAI · AI Frontier · San Francisco, CA · Applied AI

OpenAI is seeking Staff+ iOS engineers to build and evolve the core Swift platform infrastructure for their AI products like ChatGPT, Atlas, and Sora. The role focuses on improving performance, reliability, and developer velocity through foundational frameworks, internal tooling, and automation, enabling other engineers to develop new capabilities faster. This is a platform engineering role supporting AI development.

What you'd actually do

  1. Build and evolve foundational Swift frameworks used across multiple apps and platforms (caching, state management, observability, navigation, component systems).
  2. Improve app performance (startup, responsiveness, memory, battery) through profiling, visibility, regression prevention, or architecture patterns.
  3. Strengthen reliability: systemically reduce crashes, improve error handling, or drive release process improvements.
  4. Embed with product engineering teams in order to understand pain points or emerging infrastructure needs.
  5. Develop internal tooling and automation (Bazel, CI, testing, guardrails, Codex agent skills and systems) that increase engineering velocity.

Skills

Required

  • Swift
  • concurrency
  • networking
  • Xcode ecosystem
  • UIKit/SwiftUI

Nice to have

  • performance
  • build/CI
  • AI developer productivity
  • UI frameworks
  • automated testing
  • Bazel
  • CI
  • testing
  • guardrails
  • Codex agent skills and systems

What the JD emphasized

  • AI developer productivity
  • AI tools
  • AI systems