Senior iOS Engineer – Build Secure Global Apps

Experis; Doncaster; On-site; GBP 70,000 - 110,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a leading cyber software client. You will work hands-on across the full development lifecycle—from feature design to App Store release—collaborating with product, engineering, and QA teams to deliver secure, high-quality mobile experiences.

You’ll design, develop, and deliver new iOS features at global scale, lead custom iOS implementations, and ensure performance, security, and quality. Apply to build security-focused apps used by millions.

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 (e.g. MVVM, Clean Architecture).
• Solid understanding of CS fundamentals, including algorithms and data structures.
• Knowledge of mobile security, performance optimization, and Apple HIG.

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

Clean Architecture

CS fundamentals

Security awareness

Xcode

TestFlight

App Store Connect

Git

Jira

Confluence

Tools

Xcode

TestFlight

App Store Connect

Git

Jira

Confluence

Job description

Experis is seeking a Senior iOS Developer to join a leading cyber software client. You will work hands-on across the full development lifecycle—from feature design to App Store release—collaborating with product, engineering, and QA teams to deliver secure, high-quality mobile experiences.

You’ll design, develop, and deliver new iOS features at global scale, lead custom iOS implementations, and ensure performance, security, and quality. Apply to build security-focused apps used by millions.