Senior iOS Engineer - Security & Scalable Apps

Spencer Rose Ltd; Rowberrow; Hybrid; GBP 69,000 - 74,000; Full time

Job summary

Spencer Rose Ltd. is seeking a Senior iOS Engineer to join a large financial services organisation. You will design and develop secure, scalable iOS components and SDKs, working within a modular codebase to drive reusability across multiple teams.

The role focuses on high-quality Swift-based iOS delivery, modern architecture, and collaboration with mobile security and engineering groups to tackle complex challenges at scale.

Qualifications

• Strong commercial experience developing iOS applications using Swift.
• Excellent knowledge of Xcode, Git, GitHub, XCTest and XCUITest.
• Strong understanding of modular app architecture and MVVM.
• Hands-on experience building, maintaining and integrating SDKs.
• Strong understanding of Swift concurrency (async/await, GCD, Operations).

Responsibilities

• Designing and developing high-quality iOS applications, components and SDKs.
• Building scalable, reusable solutions that can be consumed across multiple engineering teams.
• Working within a modularised iOS codebase and applying modern architectural patterns.
• Collaborating with engineering teams to drive reusability and reduce technical waste.
• Designing performant and thread-safe solutions using Swift concurrency.
• Contributing to engineering quality through testing, code reviews and CI.
• Collaborating with stakeholders across the wider mobile technology function.
• Supporting the development of secure and robust mobile applications at scale.

Skills

iOS development

Swift

MVVM

Modular architecture

SDK integration

Swift concurrency

Team collaboration

CI/CD

Tools

Xcode

Git

GitHub

XCTest

XCUITest

Job description

Spencer Rose Ltd. is seeking a Senior iOS Engineer to join a large financial services organisation. You will design and develop secure, scalable iOS components and SDKs, working within a modular codebase to drive reusability across multiple teams.

The role focuses on high-quality Swift-based iOS delivery, modern architecture, and collaboration with mobile security and engineering groups to tackle complex challenges at scale.