Senior iOS Engineer Jobs in USA 2026 with Visa Sponsorship

This role is part of the Mobile Core team at Twitch, a global live streaming platform focused on gaming, entertainment, and interactive communities. The position focuses on building and improving foundational iOS systems that support large-scale mobile experiences used by millions of users worldwide.

The Senior iOS Engineer contributes to core mobile infrastructure, including video playback systems, hybrid mobile architecture, and developer tooling. The role plays a key part in shaping how mobile engineering teams across the organisation build and scale iOS applications.

About the Role

The Senior iOS Engineer is responsible for designing and developing core iOS frameworks and infrastructure that support multiple product teams. The role focuses on building scalable mobile systems, improving performance, and enabling hybrid mobile experiences that integrate native iOS with web-based technologies. It also involves technical leadership, mentoring engineers, and contributing to architectural decisions across the mobile engineering organisation.

About the Hiring Organisation

Twitch is a global live streaming platform owned by Amazon, enabling communities to interact through live content across gaming, entertainment, music, sports, and more. The organisation operates at large scale and focuses heavily on performance, real-time communication, and creator-driven experiences. Its mobile engineering teams build infrastructure and tools that support millions of daily active users across iOS and other platforms.

Job Duties

• Own and develop core iOS frameworks and mobile platform components.
• Design and implement video playback infrastructure for large-scale streaming.
• Build and maintain hybrid mobile architecture using WebView and React-based integrations.
• Improve performance and scalability of iOS applications used by millions of users.
• Lead architectural decisions for mobile platform systems and frameworks.
• Provide technical mentorship to engineers across multiple teams.
• Develop developer tools and infrastructure to improve engineering productivity.
• Collaborate with cross-functional teams on mobile architecture standards.
• Drive optimisation of mobile performance, reliability, and scalability.
• Contribute to testing frameworks and automation for mobile applications.

Job Requirements

• Six or more years of professional iOS development experience.
• Strong proficiency in Swift and iOS system architecture.
• Experience building and shipping production iOS applications to the App Store.
• Experience designing scalable mobile architectures and frameworks.
• Experience leading technical initiatives or platform-level engineering work.
• Experience mentoring and supporting other engineers.
• Experience with hybrid mobile systems such as WebView or React-based integrations.
• Experience working with video streaming or real-time communication systems.
• Strong understanding of mobile performance optimisation and debugging.
• Ability to collaborate across teams and drive technical alignment.

#339966;">#339966;" href="https://job-boards.greenhouse.io/twitch/jobs/8592666002" target="_blank" rel="noopener">Click Here to Apply

Conclusion

This Senior iOS Engineer role offers the opportunity to work on large-scale mobile systems powering one of the world’s leading live streaming platforms. It provides deep exposure to mobile architecture, video infrastructure, and hybrid application design within a high-performance engineering environment.

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