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# Software Engineer

- **Company:** Apple Inc.
- **Location:** Cupertino, CA, United States
- **Experience:** Expert
- **Salary:** $184,700.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, IOS Applications, Apple IOS, Apple Mac Systems, Architectural Patterns, C++ (Programming Language), Memory Management, Mobile Application Software, Machine Learning, Objective-C (Programming Language), Software Architecture, Tensorflow, Software Engineering, System Programming, Systems Integration, Swiftui, Retrieval-Augmented Generation, Large Language Models, Prompt Engineering, Ios Frameworks, Caching, Agentic-AI, Optimization Algorithms, Model Quantization, Virtual Agents, Model Inference, Multiplatform
- **Published:** October 4, 2026
- **Apply:** https://www.themuse.com/jobs/apple/senior-software-engineer-ondevice-health-agentic-systems-9b9085

## About the Role

Experience with on-device ML frameworks like Core ML, Foundation Model, etc.

Experience in SwiftUI and modern iOS architectural patterns.

Knowledge of model quantization, caching, and other on-device optimization techniques.

Experience with multi-platform development (e.g., building for both iOS and macOS).

Minimum Qualifications

5+ years of professional software development with expert-level experience building high-performance, consumer-facing mobile applications and frameworks.

Strong proficiency in a modern systems programming language such as C++, ObjectiveC/Swift, or Rust. A demonstrated ability to quickly master new languages and platforms is highly valued.

Deep understanding of mobile system fundamentals: concurrency, memory management, and power optimization., Practical knowledge of how LLM-powered systems work, including prompt engineering, agent frameworks, or RAG architectures.

## Description

We are seeking a senior iOS Software Engineer with deep experience building applications powered by Large Language Models (LLMs). This is a hands-on development role focused on creating the next generation of intelligent on-device experiences for Apple users.

You will be responsible for building cutting-edge iOS applications that serve as the primary interface for on-device AI. A key part of your role will be to explore and define the software architecture for a scalable, high-performance system that seamlessly integrates powerful LLM agents into the Apple ecosystem, all while prioritizing user privacy and on-device performance.

This role is for an expert iOS developer passionate about building the foundational architecture for AI-driven applications., Scalable On-Device Architecture: Design the client-side frameworks and architectural patterns for integrating LLM systems efficiently on iOS.

 - LLM Agent Integration: Implement the software that connects user-facing applications to on-device and hybrid AI reasoning and planning engines.

 - Interactive AI Prototypes: Rapidly build and iterate on application prototypes to explore new user interactions and architectural options.

Impact:

This is a unique opportunity to define the future of intelligent applications at Apple. You will be at the center of building a new class of on-device experiences, setting the architectural foundation for how millions of users will interact with AI on a daily basis.

Responsibilities:

Lead the development of sophisticated iOS frameworks and applications that integrate directly with on-device LLM systems on Apple platforms.

Architect robust, scalable, and power-efficient software patterns for AI-powered features on iOS.

Collaborate with ML and AI researchers to translate cutting-edge models into tangible application features.

Implement and optimize the on-device components for LLM inference, context management, and tool execution.