ActAI (Bjak)

iOS software engineer

In short

This role builds and maintains iOS applications in Swift/SwiftUI for ActAI, a company creating proactive AI-driven apps for conversations, errands, and workflows. The job centers on integrating AI-powered features via backend APIs, designing UX for AI interactions like streaming and retries, and ensuring production stability and performance. It requires at least 3 years of iOS development experience with Swift and hands-on experience integrating AI features into mobile apps.

About
ActAI builds proactive applications that bring intelligence to conversations, errands, organising, and workflows with minimal to no prompting. Its product focuses on reliable long-running workflows, persistent context, and real-world task completion.
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
•Deliver stable, smooth, and reliable iOS applications for real-world use
•Detect, monitor, and resolve production issues with clear root-cause analysis
Requirements
•At least 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
•Strong intuition for AI UX patterns and user trust considerations
•Ability to bring structure, exercise judgment, and execute independently
Nice to have
•Exposure to CoreML or light on-device ML
•Familiarity with feature flags or remote configuration systems
Conditions
•Location: Spain
•Remote work
•Salary not specified

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