Senior iOS Developer

Experis; Portsmouth; On-site; GBP 75,000 - 110,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a leading cyber software client to build and evolve iOS applications.

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

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

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 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.

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

MVVM architecture

Clean Architecture

CS fundamentals

Mobile security

Performance optimization

Apple HIG

Xcode

TestFlight

App Store Connect

Git

CI

Jira

Confluence

Tools

Xcode

TestFlight

App Store Connect

Git

CI/CD

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.