Senior iOS Engineer, Amazon

• 6+ years of non-internship professional software development experience
• 6+ years of programming with at least one software programming language experience
• 6+ years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience
• Experience as a mentor, tech lead or leading an engineering team
• 6+ years of professional iOS development experience
• Strong proficiency with Swift and the iOS architectural components and ecosystem
• 6+ years of building and shipping production iOS applications to the Apple App Store
• A talent for building consensus around technical decisions and guiding the team along evolving architecture patterns
• Track record of leading major architectural initiatives, migrations, or platform-level projects
• Experience mentoring engineers and raising the technical bar across teams
• Experience leveraging AI-powered development tools (such as Claude Code, GitHub Copilot, Cursor, or similar) to accelerate development

Desirable

• The Mobile Core team develops frameworks and tools that empower engineering teams across Twitch to build compelling mobile experiences
• In this role, you will directly contribute to creating and refining core features, such as Video Playback, while architecting strategic solutions for internal developers
• Twitch is evolving its mobile strategy from native-first to a hybrid approach that leverages React in WebViews alongside native iOS capabilities
• You'll work on high-impact initiatives including our hybrid web-to-mobile platform, performance optimization at scale, automated testing infrastructure, and developer tooling that accelerates velocity across the organization
• You will report to the Senior Engineering Manager for Mobile Core iOS and can work from either our Seattle, Irvine, San Francisco or our New York City offices
• Own and drive the technical strategy for foundational iOS components, native video playback infrastructure, and hybrid (React in WebView) frameworks
• Architect and build robust WebView infrastructure and bridges that enable seamless integration between React-based web content and native iOS functionality
• Lead performance optimization efforts for platform components used by millions of daily active users, establishing benchmarks and best practices
• Provide technical leadership and mentorship to iOS engineers across multiple product teams and within Mobile Core, including onboarding and growing L4/L5 engineers
• Drive cross-organizational architectural decisions that balance developer velocity, app performance, and maintainability, representing Mobile Core's technical perspective in org-wide discussions
• Collaborate with cross-functional teams to establish and maintain development standards for hybrid mobile applications, influencing adoption across the mobile engineering organization