Senior iOS Engineer — Build Secure Global Apps

Experis; Basildon; On-site; GBP 70,000 - 90,000; Full time

Job summary

Experis is seeking a Senior iOS Developer to join a leading cyber software client to build and evolve iOS applications at scale. You’ll work across the full development lifecycle from design to App Store release, collaborating with product, engineering, and QA teams to deliver secure mobile experiences.

You’ll contribute as a hands-on engineer with strong knowledge of Swift/Objective-C, modern iOS architectures, and security best practices, working in a fast-moving environment to ship

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.
• 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

MVVM

Clean Architecture

iOS SDK

Security best practices

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 to build and evolve iOS applications at scale. You’ll work across the full development lifecycle from design to App Store release, collaborating with product, engineering, and QA teams to deliver secure mobile experiences.

You’ll contribute as a hands-on engineer with strong knowledge of Swift/Objective-C, modern iOS architectures, and security best practices, working in a fast-moving environment to ship