Senior iOS Engineer

Summary

Join Customer.io, a company used by over 7,500 companies to send billions of messages daily, and help us build stable, performant, and easy-to-integrate multi-platform SDKs. As a mobile developer, you will design and build these SDKs, drive architecture and workflows, shape public APIs, support external developers, and write great documentation. You will also prototype with AI tools and explore new ways to streamline development and integration. We value ownership, product taste, and a healthy disregard for the status quo. We offer a competitive salary ($150,000-$200,000 USD), comprehensive benefits (100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums; 16 weeks paid parental leave; unlimited PTO; stipends for remote work and wellness; and a professional development budget), and a collaborative work environment.

Requirements

• 7+ years of mobile development experience, with a strong foundation in native iOS
• Demonstrated experience designing and shipping SDKs used by third-party developers
• Comfort working across mobile platforms and frameworks, with an eye toward developer ergonomics on each
• Strong API design sensibilities
• You prioritize clarity, usability, and long-term maintainability
• You understand and balance the needs of marketers and mobile developers
• You're helpful, clear, and responsive when working with external developers or unblocking teammates

Responsibilities

• Design and build multi-platform SDKs that are stable, performant, and easy to integrate
• Drive architecture, testing, and release workflows
• Guide technical strategy and make long-term bets
• Push our SDKs forward
• Shape public APIs, adopt new platform capabilities, and ensure integrations stay current
• Support external developers by providing thoughtful guidance and helping resolve technical issues quickly and clearly
• Write great documentation
• From tutorials to reference material, you’ll help make our SDKs accessible to teams of all sizes
• Prototype with AI tools and explore new ways to streamline development and integration

Benefits

• 100% coverage of medical, dental, vision, mental health, and supplemental insurance premiums for you and your family
• 16 weeks paid parental leave
• Unlimited PTO
• Stipends for remote work and wellness
• A professional development budget