iOS Engineer

Team

Join OpenAI's ChatGPT Mobile Infrastructure team building the core Swift platform — from architecture to CI — that enables hundreds of engineers (and their agents) to develop new capabilities in ChatGPT, Atlas, Sora, and other rapidly evolving apps. The focus is helping teams move quickly while improving performance and reliability.

Responsibilities

• Build and evolve foundational Swift frameworks used across multiple apps and platforms (caching, state management, observability, navigation, component systems)
• Improve app performance (startup, responsiveness, memory, battery) through profiling, visibility, regression prevention, and architecture patterns
• Strengthen reliability: systemically reduce crashes, improve error handling, drive release process improvements
• Embed with product engineering teams to understand pain points and emerging infrastructure needs
• Develop internal tooling and automation (Bazel, CI, testing, guardrails, Codex agent skills and systems) that increase engineering velocity
• Translate messy real-world constraints into clean abstractions — simple APIs, enforceable contracts, safe defaults

Requirements

• Strong iOS engineering fundamentals (Swift, concurrency, networking, Xcode ecosystem, UIKit/SwiftUI) and familiarity with latest features and practices
• Gravitate towards platform problems: frameworks, architecture, performance, or tools that empower and accelerate others
• Take ownership — continually identify biggest risks/opportunities, drive projects to completion, update quickly
• Care about measurement — instrument, define metrics, run experiments, iterate based on data
• Strong communication and collaboration skills — aligning on interfaces, navigating tradeoffs, driving cross-team execution
• Tend to think in systems, fight entropy, and enjoy ambiguous challenges

Benefits

• Equity
• Comprehensive medical, vision, dental coverage
• 401(k) retirement plan
• Short & long-term disability insurance
• Life insurance
• Various other discounts and perks