Senior iOS Engineer: Build Security‑First Apps Globally

Experis; Bradley Stoke; 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, helping build and evolve iOS applications. You’ll be hands-on across the full development lifecycle—from design to App Store release—collaborating with product, engineering and QA teams to deliver secure, high‑quality mobile experiences.

Design, develop and deliver new features at global scale; lead custom iOS implementations; ensure performance and security; and contribute to L3 support when required.

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 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.

Job description

Experis is seeking a Senior iOS Developer to join a leading cyber software client, helping build and evolve iOS applications. You’ll be hands-on across the full development lifecycle—from design to App Store release—collaborating with product, engineering and QA teams to deliver secure, high‑quality mobile experiences.

Design, develop and deliver new features at global scale; lead custom iOS implementations; ensure performance and security; and contribute to L3 support when required.