Mobile iOS Engineer, xAI

• This organization is for individuals who appreciate challenging themselves and thrive on curiosity
• Work ethic and strong prioritization skills are important
• All engineers and researchers are expected to have strong communication skills
• They should be able to concisely and accurately share knowledge with their teammates
• Expert in Swift and Objective-C, with deep knowledge of SwiftUI and UIKit
• 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 X
• Skilled in concurrency and reactive programming (Combine) for responsive, real-time apps
• Built high-throughput integrations with APIs (REST, GraphQL) or backend systems, 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
• Technically Exceptional: You possess deep expertise in iOS development, particularly with Swift and Objective-C. We seek individuals who operate at the highest levels of their craft
• Efficient: You excel at delivering results swiftly, often in a fraction of the time others require. Speed is a core value at X—we must act decisively to succeed
• Hardworking
• High Agency: You don’t wait for direction—you take initiative, propose bold ideas, and make things happen, both technically and from a product perspective
• Product-Minded: You have a sharp product sense, with an ability to empathize with users, anticipate their needs, and translate that into features that delight and deliver value

Desirable

• Our team is small, highly motivated, and focused on engineering excellence
• All employees are expected to be hands-on and to contribute directly to the company’s mission
• Leadership is given to those who show initiative and consistently deliver excellence
• At X, our small but fast-paced team values innovation, creativity, and a strong commitment to our mission
• As an iOS Engineer, you'll have the opportunity to make a significant impact on the future of X and our aspiration to build the Everything App
• We’re seeking an exceptional iOS Engineer to join a small, high-impact team dedicated to creating a transformative mobile experience at X, judged by the impact it delivers to users
• You’ll shape cutting-edge mobile experiences, blending technical mastery with a keen product sense to deliver experiences that resonate with users
• Dream up and craft delightful, intuitive user experiences that redefine how people interact with X on mobile, balancing technical innovation with a deep understanding of user behavior and needs
• Obsess over every pixel, animation, and interaction, ensuring the experience feels magical, seamless, and purposeful—delivering joy and utility in equal measure
• Build blazing-fast, highly performant systems where every millisecond counts, while ensuring the product solves real user problems
• Drive technical and product decisions, collaborating with designers, engineers, and cross-functional teams to deploy innovative features globally, with an eye toward maximizing user impact

• After submitting your application, the team reviews your CV and statement of exceptional work
• If your application passes this stage, you will be invited to a 15-30 minutes phone interview, during which a member of our team will ask technical questions
• If you clear the phone interview, you will proceed to next steps:
• Deep dive coding challenge
• Meet and greet with the wider team
• Our goal is to complete the process within one week. All interviews will be conducted in person when applicable