Senior iOS Developer

Experis; Southampton; On-site; GBP 70,000 - 90,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a leading cyber software client and help build and evolve iOS applications. You’ll be hands-on, covering the full development lifecycle—from feature design through App Store release—collaborating with product, engineering, and QA teams to deliver secure, high-quality mobile experiences.

You’ll design, develop, and deliver new features at global scale; lead custom iOS features; work with Product Managers, Tech Leads, and QA to plan, build, and

Qualifications

• Proven experience as an iOS developer with shipped production apps.
• Strong knowledge of Swift, Objective-C and the iOS SDK.
• Experience with modern iOS architectures (MVVM, Clean Architecture).
• Solid CS fundamentals, algorithms and data structures.
• Understanding of mobile security and performance optimization.

Responsibilities

• Design, develop, and deliver new features iOS applications at global scale.
• Lead the implementation of custom iOS features.
• Collaborate with Product Managers, Tech Leads, and QA to plan, build, and ship features.
• Ensure high standards of quality, performance, and security.
• Debug, track, and resolve defects; contribute to L3 support when required.
• Help drive innovation within the iOS platform and development practices.

Skills

iOS development

Swift

Objective-C

iOS architectures

CS fundamentals

Tools

Xcode

TestFlight

App Store Connect

Git

CI

Jira

Confluence

Job description

Senior iOS Developer

The Role

We’re looking for a Senior iOS Developer to join a leading cyber software client of ours to help build and evolve their iOS applications.

You’ll be a hands‑on engineer, working across the full development lifecycle—from early feature design through to App Store release—collaborating closely with product, engineering, and QA teams to deliver secure, high‑quality mobile experiences.

What You’ll Do

• Design, develop, and deliver new features iOS applications at global scale
• Lead the implementation of custom iOS features.
• Collaborate with Product Managers, Tech Leads, and QA to plan, build, and ship features.
• Ensure high standards of quality, performance, and security.
• Debug, track, and resolve defects; contribute to L3 support when required.
• Help drive innovation within the iOS platform and development practices

What You’ll Bring

• Proven experience as an iOS Developer with shipped production apps
• Strong knowledge of Swift, Objective‑C, and the iOS SDK
• Experience with modern iOS architectures (e.g. MVVM, Clean Architecture)
• Solid understanding of CS fundamentals, including algorithms and data structures
• Knowledge of mobile security, performance optimization, and Apple HIG
• Experience with Xcode, TestFlight, App Store Connect, Git, CI, Jira, and Confluence
• A proactive, problem‑solving mindset and ability to thrive in a fast‑moving environment

Why Join?

• Build security‑focused products used by millions of users
• Work on complex, high‑impact mobile technology
• Collaborate with experienced engineers and product leaders
• Make a real difference in a growing, innovative company

Ready to build secure iOS apps that operate at global scale? We’d love to hear from you.