Full job descriptioniOS Software Engineer
London
Full time, Hybrid
The Company:
There are over 5 billion users using basic applications today such email, notes, tasks that are not AI-native. The mission is to build a proactive smart assistant for everyday users to bring intelligence to conversations, errands, organising and workflows with minimal prompting.
The product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. The system must handle multi-step reasoning, interact with external tools, and remain reliable despite non-deterministic model behaviour. The objective is to help users enjoy completing daily tasks in over 90% reduced time.
The Role:
As an iOS Software Engineer, you own the iOS client experience, how AI feels, responds, and performs in users’ hands. This is not a thin integration role. You will build a production-grade iOS application where AI interactions are central to product experience, and performance, reliability, and user trust are critical.
*Build and maintain iOS applications using Swift and SwiftUI.
*Integrate AI-powered features through backend APIs.
*Design UX patterns for AI interactions, including loading states, streaming responses, retries, and fallbacks.
*Optimize performance, memory usage, and battery efficiency.
*Capture user signals and feedback to support AI evaluation and iteration.
*Collaborate closely with backend and ML engineers on API design and system behavior.
*Maintain high App Store quality, stability, and production reliability.
Requirements:
*3+ years of iOS development experience using Swift.
*Hands-on experience integrating AI-powered features into mobile apps.
*Strong understanding of async/await, concurrency, and background tasks.
*Solid iOS performance and memory optimization skills.
*Experience shipping and maintaining production iOS apps.
*Comfort designing for latency, partial failure, and non-deterministic AI behavior.
*Exposure to CoreML or light on-device ML.
*Familiarity with feature flags or remote configuration systems.
*Strong intuition for AI UX patterns and user trust considerations.
Outcomes:
*Stable, smooth, and reliable real-world use iOS applications.
*Performance is optimized: responsive, low-latency, and efficient on memory and CPU.
*Production issues are detected early, monitored effectively, and resolved with clear root-cause analysis.
Tech Stack:
*Swift
*SPM
*SwiftUI
*SQL / noSQL
*TensorFlow Lite (on-device inference)
The Team:
The best products today in the world were built by small, world class teams. You will be joining a high talent density and hands-on team who make decisions collectively, move at rapid speed, striking a balance between shipping high-quality work and learning. Joining the team requires the ability to bring structure, exercise judgment, and execute independently. The collective goal is to give users a truly magical product.