AI-Driven iOS Engineer - SwiftUI & On-Device ML

ActAI; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

ActAI is seeking an experienced iOS Software Engineer to own the iOS client experience, shaping how AI feels, responds, and performs for users. You will build a production-grade iOS app where AI interactions are central to the product, emphasizing performance, reliability, and user trust.

You will work with backend and ML engineers to design robust APIs and UX patterns for AI interactions, focusing on latency, streaming responses, and memory efficiency across production apps.

Qualifications

• 3+ years of iOS development with Swift.
• Experience integrating AI-powered features into mobile apps.
• Strong understanding of async/await, concurrency, and background tasks.
• Ability to design for latency and non-deterministic AI behavior.

Responsibilities

• 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.
• Collaborate with backend and ML engineers on API design and system behavior.
• Maintain high App Store quality, stability, and production reliability.

Skills

Swift

SwiftUI

Async/await

Memory optimization

Production iOS apps

AI UX patterns

Tools

CoreML

TensorFlow Lite

SPM

SQL

NoSQL

Job description

ActAI is seeking an experienced iOS Software Engineer to own the iOS client experience, shaping how AI feels, responds, and performs for users. You will build a production-grade iOS app where AI interactions are central to the product, emphasizing performance, reliability, and user trust.

You will work with backend and ML engineers to design robust APIs and UX patterns for AI interactions, focusing on latency, streaming responses, and memory efficiency across production apps.