Senior iOS Engineer — Global‑Scale, Security‑Focused Apps

Experis; Woking; On-site; GBP 85,000 - 110,000; Full time

Job summary

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

You’ll design, develop, and ship iOS apps at global scale, using Swift and Objective‑C, MVVM or Clean Architecture, and you’ll contribute to performance optimization and mobile 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.

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

Swift

Objective-C

iOS SDK

MVVM

Clean Architecture

CS fundamentals

mobile security

performance optimization

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 UK. You’ll work across the full development lifecycle—from feature design to App Store release—collaborating closely with product, engineering, and QA teams to deliver secure, high‑quality mobile experiences.

You’ll design, develop, and ship iOS apps at global scale, using Swift and Objective‑C, MVVM or Clean Architecture, and you’ll contribute to performance optimization and mobile security.