Senior iOS Engineer: Build Secure Global Apps

Experis; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Job summary

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

You will design, develop, and ship features for iOS at global scale, collaborating with Product Managers, Tech Leads, and QA. A focus on security, performance, and robust architectures is essential in a fast-paced environment.

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.
• Experience with Xcode, TestFlight, App Store Connect, Git, CI, Jira, and Confluence.

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

Performance optimization

Problem solving

Team collaboration

Tools

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 work across the full development lifecycle, from feature design to App Store release, delivering secure, high‑quality mobile experiences.

You will design, develop, and ship features for iOS at global scale, collaborating with Product Managers, Tech Leads, and QA. A focus on security, performance, and robust architectures is essential in a fast-paced environment.