IOS Engineer (Mobile Security)

Coltech; Manchester; Hybrid; GBP 83,000 - 138,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

Coltech is seeking an experienced iOS Engineer to join a high-performing Mobile Security team in the UK. You will develop security-focused iOS applications, frameworks, and SDKs, collaborating with engineering teams to deliver secure, scalable mobile experiences.

Join a hybrid-working environment in Manchester with modern tooling (Xcode, Git, GitHub). You will contribute to reusable components, apply MVVM architecture, and advocate best practices like TDD and CI/CD.

Qualifications

• Strong Swift development skills for iOS platforms.
• Experience delivering production-scale iOS apps.
• Familiarity with MVVM architecture and modularization.

Responsibilities

• Design, develop, and maintain high-quality iOS applications, frameworks, and SDKs using Swift.
• Contribute to reusable security components across mobile apps.
• Build scalable solutions with MVVM and modern patterns.
• Collaborate to reduce technical debt and promote code reuse.
• Advocate TDD, code reviews, CI, and automated testing.
• Ensure thread-safe, performant Swift code.

Skills

Swift

MVVM

TDD

Agile

Tools

Xcode

Git

GitHub

XCTest

XCUITest

Job description

The Opportunity

We're looking for an experienced iOS Engineer to join a high-performing Mobile Security team within a major banking environment. This team is responsible for delivering security capabilities across the mobile channel, providing a suite of security components and services that help protect mobile applications at scale.

You will play a key role in developing and enhancing security-focused mobile solutions, collaborating with engineering teams across the organisation to ensure mobile applications remain secure, scalable, and resilient against evolving threats.

This is an excellent opportunity for an engineer who enjoys building reusable mobile frameworks, SDKs, and high-quality iOS applications within a modern engineering environment.

Responsibilities

• Design, develop, and maintain high-quality iOS applications, frameworks, and SDKs using Swift.
• Contribute to the development of reusable security components used across multiple mobile applications.
• Build scalable, modular solutions using modern architectural patterns such as MVVM.
• Collaborate with engineering teams to promote code reuse, improve developer experience, and reduce technical debt.
• Advocate engineering best practices including TDD, code reviews, pair programming, continuous integration, and automated testing.
• Ensure solutions are performant, maintainable, and thread-safe using modern Swift concurrency patterns.
• Partner with cross-functional teams to deliver secure and reliable mobile experiences.
• Support the continuous improvement of development processes, tooling, and application security standards.
• Hands‑on experience with:
• Xcode
• Git
• GitHub
• XCTest
• XCUITest
• Strong understanding of modular application architecture and frameworks-based modularisation.
• Experience implementing architectural patterns such as MVVM.
• Proven experience building, maintaining, and integrating reusable SDKs.
• Strong understanding of Swift concurrency, including:
• Grand Central Dispatch (GCD)
• Operations
• Experience delivering production-scale iOS applications within Agile environments.
• Excellent communication and stakeholder management skills.
• Strong advocate of engineering excellence and software craftsmanship.
• Knowledge of mobile application security principles and best practices.
• Experience with:
• Secure storage
• Authentication and authorisation flows
• Secure handling of sensitive data
• Exposure to mobile security services such as penetration testing and application hardening.
• Experience with mobile CI/CD tooling including:
• GitHub Actions
• Fastlane
• Automated build and deployment pipelines
• Previous experience within Financial Services or other highly regulated environments.

Why Apply?

• Join a team focused on securing mobile applications used by millions of customers.
• Work on large-scale, enterprise-grade mobile platforms.
• Collaborate with talented engineers driving modern mobile engineering practices.
• Hybrid working model with a strong engineering culture.
• Competitive day rate and immediate contract opportunity.