iOS Software Engineer

ActAI; Greater London; Vor Ort; GBP 70.000 - 110.000; Vollzeit

Zusammenfassung

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.

Qualifikationen

• 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.

Aufgaben

• 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.

Kenntnisse

Swift

SwiftUI

Async/await

Memory optimization

Production iOS apps

AI UX patterns

Tools

CoreML

TensorFlow Lite

SPM

SQL

NoSQL

Jobbeschreibung

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they\u2019re not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.

Our first application is an agent-first mobile communication app. We believe building applications that users use daily for communication, coordination and collaboration needs will help integrate AI into their lives. The net effect is to eliminate misinformation, achieve low coordination costs, enable high quality tasks and collaboration at scale with minimal or little prompting.

Role

As an iOS Software Engineer, you own the iOS client experience, how AI feels, responds, and performs in users\u2019 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.

Focus

• 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.

Ideal Experiences

• 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.
• Swift
• SPM
• SwiftUI
• SQL / noSQL
• TensorFlow Lite (on-device inference)

How We Work

The best products today in the world were built by small, world class teams. We are a high talent density and hands-on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product

If there appears to be a fit, we\u2019ll reach to schedule 3, but no more than 4 interviews.

Applications are evaluated by our technical team members. Interviews will be conducted via virtual meetings and/or onsite.

We value transparency and efficiency, so expect a prompt decision. If you\u2019ve demonstrated the exceptional skills and mindset we\u2019re looking for, we\u2019ll extend an offer to join us. This isn\u2019t just a job offer; it\u2019s an invitation to be part of a team that\u2019s bringing AI to have practical benefits to billions globally.