Senior iOS Engineer — Build Secure Global-Scale Apps

Experis; Guildford; On-site; GBP 90,000 - 125,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a cyber software client. You will be hands‑on, shaping iOS apps from design through App Store release, collaborating with product, engineering, and QA teams to deliver secure, high‑quality mobile experiences.

You’ll design, develop, and deliver new features at global scale, lead implementation of custom iOS features, and ensure performance and security while resolving defects. A fast‑moving environment awaits seasoned iOS engineers.

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 (MVVM, 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

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 cyber software client. You will be hands‑on, shaping iOS apps from design through App Store release, collaborating with product, engineering, and QA teams to deliver secure, high‑quality mobile experiences.

You’ll design, develop, and deliver new features at global scale, lead implementation of custom iOS features, and ensure performance and security while resolving defects. A fast‑moving environment awaits seasoned iOS engineers.