Mobile iOS Engineer

Salary: £58,000 - 98,000 per year

Requirements:

• We are looking for an exceptional iOS engineer with deep expertise in Swift, SwiftUI, and UIKit.
• We need strong experience in performance optimization across memory, CPU, and GPU using low-level tools.
• We expect experience designing and shipping intuitive, pixel-perfect mobile UIs, especially for AI-driven experiences.
• We require proficiency in concurrency and reactive programming, including Combine, for responsive real-time applications.
• We value experience building high-throughput integrations with APIs such as REST and gRPC, or with AI model outputs.
• We want someone capable of owning complex features end-to-end, from architecture through App Store deployment, with a focus on speed and scalability.
• We prefer deep expertise in the Apple ecosystem and related development tools.
• We prefer experience with Rust for backend components.
• We prefer experience with AVFoundation for real-time audio processing.
• We prefer a track record of shipping standout apps or standout features within apps.
• We look for strong product sense, including the ability to empathize with users and translate needs into delightful features.
• We expect excellent communication skills, strong prioritization, and a hands-on work style.

Responsibilities:

• We will have you dream up and craft delightful, intuitive user experiences for AI on mobile.
• We will have you obsess over every pixel, animation, and interaction to make the experience magical and seamless.
• We will have you build blazing-fast, highly performant systems where every millisecond counts.
• We will have you drive technical and product decisions in collaboration with AI researchers and engineers.
• We will have you deploy state-of-the-art models globally and contribute directly to the company mission.
• We expect you to work hands-on in a small, high-impact team and own complex features end-to-end.

Technologies:

• AI
• Backend
• Mobile
• REST
• Rust
• Swift
• UIKit
• gRPC
• iOS
• Excel
• Flow

More:

We are SpaceXAI, and our mission is to create AI systems that can accurately understand the universe and help humanity in its pursuit of knowledge. We are a small, highly motivated team focused on engineering excellence, curiosity, and challenging work in a flat organizational structure where initiative and consistent delivery are valued. We offer a total rewards package that includes a base salary of 107,000 to 262,000 GBP, equity, comprehensive healthcare and dental coverage, cash plan, income protection, life insurance, and various discounts and perks. We are an equal opportunity employer.

last updated 36 week of 2026