Principal iOS Developer

£80,000–£100,000 • Remote (UK) • Quarterly travel to Southampton

We’re looking for a Principal iOS Developer to lead the build of a cutting-edge healthtech app that uses computer vision and AI to measure vital signs through a smartphone camera. This role combines hands-on development, technical leadership, and collaboration within a regulated medical software environment.

What You’ll Do

• Lead architecture and development of a high-performance iOS app.

• Work within ISO 13485 / IEC 62304 processes and support product validation.

• Mentor developers and raise engineering standards.

• Collaborate with AI/ML, backend, product, and design teams.

• Drive improvements across testing, automation, and release processes.

What You’ll Bring

• Expert-level Swift and strong SwiftUI/UIKit skills.

• Experience with computer vision (Core Image, AVFoundation, Vision).

• Deep understanding of multithreading, memory management, and performance optimisation.

• Strong communication and ability to mentor others.

• Background in regulated, healthtech, or real-time processing is a bonus.

Experience

• 7+ years of iOS development, including 2+ years in a lead or principal role.

• Proven delivery of high-quality production apps.