Mobile iOS Engineer

Applied Intuition Inc.; Greater London; On-site; GBP 132,000 - 325,000; Full time

Job summary

A leading AI technology firm is seeking an exceptional iOS engineer to join a high-impact team. In this role, you will craft cutting-edge mobile experiences, utilize advanced Swift knowledge, and work collaboratively to deploy innovative AI applications. You will be responsible for developing intuitive user interfaces and ensuring app performance. The position offers a competitive salary ranging from $180,000 to $440,000 USD and numerous benefits including comprehensive health coverage and equity.

Benefits

Comprehensive medical coverage

401(k) retirement plan

Equity options

Life insurance

Short & long-term disability insurance

Qualifications

• Expert in Swift, knowledgeable in SwiftUI and UIKit.
• Experience designing intuitive mobile UIs for AI interactions.
• Skilled in concurrency and real-time app development.

Responsibilities

• Craft delightful user experiences on mobile.
• Ensure seamless performance in mobile interactions.
• Collaborate with engineers to deploy advanced AI models.

Skills

Swift

SwiftUI

UIKit

Concurrency

Reactive programming (Combine)

API integration (REST, gRPC)

Tools

Apple development tools

Rust

Job description

Overview

xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. 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. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

About the Role

We’re seeking an exceptional iOS engineer to join a small, high-impact team dedicated to creating the world’s most valuable AI application, judged by the impact it delivers to users. You’ll shape cutting-edge mobile experiences, blending technical mastery with product brilliance. An ideal candidate meets at least the following requirements:

• Expert in Swift, with deep knowledge of SwiftUI and UIKit.
• Experienced in designing and shipping intuitive, pixel-perfect mobile UIs that redefine how users interact with AI.
• Skilled in concurrency and reactive programming (Combine) for responsive, real-time apps.
• Built high-throughput integrations with APIs (REST, gRPC) 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.

Additionally, experience in any of the following may set you apart:

• Deep expertise in the Apple ecosystem and related development tools.
• Rust for working with our backend components.
• Track record of shipping standout apps or standout features within apps.

What You’ll Do

• Dream up and craft delightful, intuitive user experiences that redefine how people interact with AI on mobile.
• 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 AI researchers and engineers to deploy state-of-the-art models globally.

Who You Are

• Technically Exceptional: You possess deep expertise in iOS development, particularly with Swift. 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 xAI—we must act decisively to succeed.
• Hardworking
• High Agency: You don’t wait for direction—you take initiative and make things happen.
• 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.

Location

You can work out of xAI’s Palo Alto or San Francisco office.

Interview Process

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 minute interview ("phone interview") during which a member of our team will ask some basic questions. If you clear the initial phone interview, you will enter the main process, which consists of 3 technical interviews:

• Coding assessment in a language of your choice.
• Systems hands-on: Demonstrate practical skills in a live problem-solving session.
• Project deep-dive: Present your past exceptional work to a small audience.
• Meet and greet with the wider team.

Our goal is to finish the main process within one week. All interviews will be conducted via Google Meet.

Annual Salary Range

$180,000 - $440,000 USD

Base salary is just one part of our total rewards package at xAI, 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.