Sr. Mobile iOS Engineer

The role

This person will build and improve the X app for iOS as part of a small, high-impact team. The work covers new features, user experience, performance and app quality, including A/B tests.

What you will do

• Craft delightful, intuitive user experiences for the app
• Obsess over every pixel, animation, and interaction
• Build fast, highly performant systems where every millisecond counts
• Drive technical and product decisions with designers, backend, Android and web engineers
• Own the quality of the products you build, including running A/B tests and finding issues
• Proactively find ways to improve the app from user feedback and your own use of it

Required qualifications

• 5+ years of experience in Swift and UIKit

Nice to have

• 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
• Excel at delivering results swiftly
• A sharp product sense and ability to empathize with users
• Proficient in performance optimization of memory, CPU and GPU
• Experienced in designing and shipping intuitive, pixel-perfect mobile UIs
• Skilled in concurrency and reactive programming (Combine)
• Built high-throughput integrations with APIs or AI model outputs
• Capable of owning complex features end-to-end, from architecture to App Store deployment

Benefits

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

Before you apply

• Equal opportunity employer

About the company

SpaceXSI is building Super Intelligence to help humanity understand the universe, including Colossus supercomputers, Grok models and applications such as Grok Bot, Grok Build, Grok Imagine, Grok Voice and X.