Senior iOS Engineer (Fully Remote - £100k+)

Senior iOS Engineer | Fully Remote | £100k - £120kA fast-growing AI company with $100m+ in funding is building a new generation of AI-native applications designed to change how people manage work and everyday life.Rather than another chatbot, the product is a unified AI workspace connecting email, Slack, Lark and other communication platforms, with AI agents capable of coordinating tasks, conversations and scheduling autonomously.We're looking for a Senior iOS Engineer to own the iOS experience and help define how AI feels, responds and performs in users' hands.You'll be building a production-grade iOS application where AI is central to the product, with performance, reliability and user trust critical to the experience.What You'll DoBuild and maintain production iOS applications using Swift and SwiftUI.Integrate AI-powered features through backend APIs.Build UX for streaming responses, loading states, retries, fallbacks and long-running workflows.Optimise performance, memory usage and battery efficiency.Capture user feedback and signals to support AI evaluation and iteration.Work closely with backend and ML engineers on APIs and system behaviour.Maintain high standards of App Store quality, stability and reliability.Explore on-device AI/ML using CoreML or TensorFlow Lite.What We're Looking ForStrong SwiftUI experience.Hands-on experience integrating AI/ML features into mobile applications.Strong understanding of async/await, concurrency and background tasks.Strong iOS performance and memory optimisation skills.Experience shipping and maintaining production iOS apps.Comfortable building for latency, partial failures and non-deterministic AI behaviour.Exposure to CoreML or on-device ML is a plus.Familiarity with feature flags / remote configuration.Strong intuition for AI UX and building user trust around AI.Why Join?You'll join a $100m+ funded AI company where AI isn't an add-on — it's the core product experience.You'll have genuine ownership over the iOS architecture and the way users interact with autonomous AI agents on mobile.