Senior iOS Software Engineer £400 per day | Inside IR35 Contract: 12 months Hybrid: 1-2 days per week on-site in Salford We''re looking for a Senior iOS Software Engineer to join a high-performing mobile engineering team working on core media playback components used at scale. This role is hands-on and suited to someone with strong iOS fundamentals, a testing-first mindset, and experience modernising large codebases. You''ll play a key role in evolving a complex iOS platform, including the migration to a more scalable architecture using Swift Package Manager. What you''ll be doing Developing and maintaining core iOS components using Swift and Objective-C Working on shared libraries and packages that support large-scale mobile applications Leading and contributing to migrations from CocoaPods to Swift Package Manager (SPM) Writing high-quality, testable code with a strong focus on TDD Building and maintaining comprehensive unit test coverage Collaborating closely with other engineers in a mature, delivery-focused team Essential experience (must be recent - last 12 months or last project) Strong commercial experience with Swift and Objective-C Proven hands-on experience using Swift Package Manager (SPM) Experience migrating large or complex iOS projects from CocoaPods to SPM Strong experience with Test-Driven Development (TDD) Writing and maintaining high-quality unit tests Experience working on complex, production-scale iOS codebases Contract detail