Senior iOS Engineer: Build Secure, Scalable Apps

Experis; United Kingdom; 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’ll be hands-on across the full development lifecycle, designing, building, and shipping secure iOS apps for a global audience, collaborating with product, engineering, and QA teams to ensure top-quality mobile experiences.

You’ll contribute to scalable architectures (MVVM, Clean Architecture), focus on performance and security, and participate in deployment processes using Xcode,

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).
• 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 for 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

data structures

mobile security

performance optimization

Apple HIG

Xcode

TestFlight

App Store Connect

Git

CI

Jira

Confluence

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’ll be hands-on across the full development lifecycle, designing, building, and shipping secure iOS apps for a global audience, collaborating with product, engineering, and QA teams to ensure top-quality mobile experiences.

You’ll contribute to scalable architectures (MVVM, Clean Architecture), focus on performance and security, and participate in deployment processes using Xcode,