iOS Software Engineer

Bjak; Town of Sweden (NY); On-site; USD 110,000 - 170,000; Full time

Job summary

A1 is seeking an iOS Software Engineer to own the iOS client experience, shaping how AI feels, responds, and performs in users' hands. You will build a production-grade iOS app where AI interactions are central to the product, prioritizing performance, reliability, and user trust.

In this role, you will collaborate with backend and ML teams, implement AI-powered features, and ensure low-latency, memory-efficient behavior on-device, while maintaining App Store quality across releases.

Qualifications

• 3+ years of iOS development experience with 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.

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.
• Capture user signals and feedback to support AI evaluation and iteration.
• Collaborate with backend and ML engineers on API design and system behavior.
• Maintain high App Store quality, stability, and production reliability.

Skills

iOS development

AI features integration

Async/await and concurrency

Performance & memory optimization

Production app maintenance

Latency and partial failure design

On-device ML experience

Feature flags / remote config

AI UX intuition

Tools

Swift Package Manager

TensorFlow Lite

CoreML

SQL / NoSQL

Job description

About A1

There are over 5 billion users using basic applications today such as email, notes, and tasks that are not AI‑native. Our mission is to build a proactive smart assistant for everyday users to bring intelligence to conversations, errands, organising and workflows, with minimal prompting.

Our 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 behavior. Our objective is to help users complete tasks daily enjoyably with over ~90%* reduced time.

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.

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.

Tech Stack

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