Senior iOS Engineer: Global-Scale, Security-Focused Apps

Experis

Chesterfield

On-site

GBP 70,000 - 110,000

Full time

8 days ago

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Job summary

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

You will design, develop, and deliver features for iOS at global scale, lead custom iOS features, and ensure performance and security.

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 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