Sr. Mobile iOS Engineer

We're seeking an exceptional iOS engineer to join a small, high-impact team building X for iOS, the app millions of people use every day to see what's happening and join the global town square. You’ll work in a fast paced environment and take ownership of constantly improving the app; from groundbreaking new features to micro optimizations.

• Craft delightful, intuitive user experiences that redefine how people interact with the app
• Obsess over every pixel, animation, and interaction, ensuring the experience feels magical and seamless
• Build blazing-fast, highly performant systems where every millisecond counts
• Drive technical and product decisions, collaborating with designers, backend, android and web engineers
• Own the quality of the products you build - including running a/b tests, finding issues, and proactively making improvements
• Be proactive in finding ways to improve the app - from user feedback and from your own daily experience on the app

• Experience in Swift and UIKit

• Deep expertise in the Apple ecosystem and related development tools
• Track record of shipping standout apps or standout features within apps
• Deep expertise in iOS development, particularly with Swift. We seek individuals who operate at the highest levels of their craft
• Excel at delivering results swiftly, often in a fraction of the time others require. Speed is a core value at SpaceXSI—we must act decisively to succeed
• A sharp product sense, with an ability to empathize with users, anticipate their needs, and translate that into features that delight and deliver value
• Proficient in performance optimization—memory, CPU, GPU—using low-level tools to deliver blazing-fast systems
• Experienced in designing and shipping intuitive, pixel-perfect mobile UIs that redefine how users interact with UI’s
• Skilled in concurrency and reactive programming (Combine) for responsive, real-time apps
• Built high-throughput integrations with APIs or AI model outputs, ensuring seamless data flow.
• Capable of owning complex features end-to-end, from architecture to App Store deployment, with a focus on speed and scalability

$200,000 - $375,000 USD

Base salary is just one part of our total rewards package at SpaceXSI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.

SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.