Principal iOS Engineer (SDK / Azure / Java) - UK, Hybrid - Architect I - Enterprise Solutions

Role description

Principal iOS Engineer (SDK / Azure / Java)

Location: Leeds or London (Hybrid)
Type: Contract / Fixed-Term Employment
Start: ASAP

We’re hiring a Principal iOS Engineer to lead the design and delivery of a Mobile SDK modernisation programme within a large-scale platform environment.

You’ll own the iOS architecture, define SDK design standards, and build enterprise-grade components focused on security, performance, and scalable distribution.

Key Responsibilities

• Lead iOS architecture and technical design for SDK development and modernisation
• Define best practices for SDK distribution, testing, and security
• Build and validate POCs aligned to target enterprise architecture
• Design reusable SDKs consumed by external mobile applications
• Ensure compliance with privacy, App Store, and regulated environment standards
• Mentor engineers and drive coding, API, and quality standards

Key Skills & Experience

• Strong experience as a Senior / Principal iOS Engineer (minimum of 6+ years)
• Proven track record building and maintaining reusable iOS SDKs/frameworks
• Expert in Swift (Concurrency, Combine) with Objective-C interoperability
• Experience with SDK distribution (XCFrameworks, SPM, CocoaPods)
• Strong understanding of iOS security (Keychain, Secure Enclave, App Attest, certificate pinning)
• Knowledge of privacy standards (ATT, Privacy Manifests, data minimisation)
• Experience with performance optimisation and testing (Instruments, XCTest)
• Familiarity with Azure / backend integration (Java-based platforms) is a plus

Hurry & apply to learn more!

#UST

Skills

java,detection system,backend development,fraud detection,cloud computing,

About UST
UST is a global digital transformation solutions provider. For more than 20 years, UST has worked side by side with the world’s best companies to make a real impact through transformation. Powered by technology, inspired by people and led by purpose, UST partners with their clients from design to operation. With deep domain expertise and a future-proof philosophy, UST embeds innovation and agility into their clients’ organizations. With over 30,000 employees in 30 countries, UST builds for boundless impact—touching billions of lives in the process.