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iOS Software Engineer

Mobile Developer • Remote • Full-time • 📍 Spain

We're looking for an iOS Software Engineer to own the iOS client experience of an AI-native assistant, focusing on user experience, performance, and reliability.

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 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

Nice to have

  • 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

Soft skills

Ability to bring structure and exercise independent judgmentExecutes independently while balancing speed and quality of workCollaborates well in a small, high-talent-density team that makes decisions collectively

About the company

A1's mission is to build a proactive, AI-native smart assistant for everyday users, bringing intelligence to conversations, errands, organising, and workflows with minimal prompting. The product focuses on high reliability for long-running workflows, persistent context, and real-world task completion, handling multi-step reasoning and interaction with external tools despite non-deterministic model behavior.

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