iOS Software Engineer - Contract Outside IR35 | 6 month contract initially | London 1 day a week preferred (flexible remote options) We''re seeking an iOS Engineer to design and deliver end-to-end features that power promotional and incentivisation experiences across high-traffic consumer apps. Your work will directly impact how millions of users engage with products, driving both adoption and revenue growth. Responsibilities Build, test, and ship iOS features from design to release. Collaborate with product, design, and Back End teams to deliver seamless, scalable solutions. Write clean, efficient, and maintainable Swift code with robust test coverage. Monitor performance metrics, troubleshoot, and optimise features. Participate actively in Agile ceremonies, contributing ideas to enhance product direction. Requirements Strong track record delivering large-scale, consumer-facing iOS apps. Deep experience with Swift, UIKit, SwiftUI, Core Animation, GCD andamp; Networking. Solid understanding of design patterns, OOP, and iOS best practices. Familiarity with analytics, measurement, and CI/CD pipelines. Experience with unit testing, profiling, and performance optimisation in Xcode. Knowledge of socket-based networking a plus. Collaborative mindset with excellent communication skills. ..... full job details .....