IOS Engineer - Contract

Job Description
Senior iOS Engineer
Location: Bristol, UK Working pattern: Hybrid Rate: £375-£400 per day, inside IR35
We're looking for a Senior iOS Engineer to join a large financial services organisation and play a key role in the security, development and scalability of its mobile applications.
You'll be joining a specialist mobile security team responsible for building and maintaining a range of security components and services used across a large portfolio of mobile applications. The team works closely with mobile engineering, strategy and technology teams to ensure applications are secure, scalable and able to evolve alongside an ever-changing threat landscape.
This is a hands-on engineering role where you'll be designing, developing and delivering mobile components and services, with a particular focus on building reusable solutions that can be adopted across multiple engineering teams.
What you'll be doing
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
Working closely with engineering teams to drive reusability and reduce technical waste
Designing performant and thread-safe solutions using modern Swift concurrency
Contributing to engineering quality through testing, code reviews and continuous integration
Collaborating with stakeholders and engineers across the wider mobile technology function
Supporting the development of secure and robust mobile applications at significant scale
What we're looking for
Strong commercial experience developing iOS applications using Swift
Excellent knowledge of modern iOS development tools including Xcode, Git, GitHub, XCTest and XCUITest
Strong understanding of modular app architecture and frameworks-based modularisation
Experience with architectural patterns such as MVVM
Hands-on experience building, maintaining and integrating SDKs
Strong understanding of Swift concurrency, including async/await, GCD and Operations
Experience designing performant and thread-safe solutions
A track record of delivering high-quality, production-scale iOS applications
Strong communication and collaboration skills, particularly when working across multiple engineering teams
Experience with engineering practices such as Pair Programming, TDD, Code Reviews, Continuous Integration and automated testing
Desirable experience
Knowledge of mobile security principles , including secure storage, authentication flows and handling sensitive data
Experience with mobile CI/CD pipelines
Experience with tools such as GitHub Actions and Fastlane
Experience implementing automated build, test and deployment processes
The opportunity
You'll be working on mobile technology used at significant scale, within a team operating at the intersection of iOS engineering, mobile security and financial services .
It's a strong opportunity for a Senior iOS Engineer who enjoys working on complex technical challenges, building reusable engineering solutions and contributing to products used by a large customer base.