Senior iOS Engineer: Build Secure Global-Scale Apps

Experis; Leeds; On-site; GBP 90,000 - 120,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a leading cyber software client in the United Kingdom. You will be hands-on across the full development lifecycle, from feature design through App Store release, delivering secure, high-quality mobile experiences.

You’ll work with Product, Engineering and QA to design, develop and ship features at global scale, applying MVVM and Clean Architecture to ensure performance and security.

Qualifications

• Proven experience as an iOS Developer with shipped production apps.
• Strong knowledge of Swift, Objective-C, and the iOS SDK.
• Experience with MVVM and Clean Architecture.
• Solid 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

iOS SDK

MVVM

Clean Architecture

CS Fundamentals

Security

Xcode

TestFlight

App Store Connect

Git

CI

Jira

Confluence

Job description

Experis is seeking a Senior iOS Developer to join a leading cyber software client in the United Kingdom. You will be hands-on across the full development lifecycle, from feature design through App Store release, delivering secure, high-quality mobile experiences.

You’ll work with Product, Engineering and QA to design, develop and ship features at global scale, applying MVVM and Clean Architecture to ensure performance and security.