Senior Software Engineer, On-Device Health Agentic Systems

Apple Inc

Cupertino, CA

JOB DETAILS
SKILLS
Apple, Application Framework, Architectural Design, Architectural Services, Artificial Intelligence (AI), C++ Programming Language, Caching, Concurrency, Ecosystems, Establish Priorities, Mac Operating System, Memory Management, Mobile Applications, Modeling Languages, Multiplatform/Cross-Platform, Objective-C Programming Language, Programming Languages, Semantic Reasoner, Software Architecture, Software Development, Software Engineering, System Integration (SI), Systems/Internals Programming, iOS
LOCATION
Cupertino, CA
POSTED
30+ days ago

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.

What Youll Build:

• AI-Powered iOS Applications: Architect and build innovative, high-performance on-device apps that showcase the power of intelligent LLM agents. • 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.

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. Drive the technical roadmap for on-device AI application architecture.

Requirements:

  • 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.
  • 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).

About the Company

A

Apple Inc

We bring amazing people together to make amazing things happen.

We’re a diverse collection of thinkers and doers, continually reimagining what’s possible to help us all do what we love in new ways. The people who work here have reinvented entire industries with the Mac, iPhone, iPad, and Apple Watch, as well as with services, including iTunes, the App Store, Apple Music, and Apple Pay. And the same passion for innovation that goes into our products also applies to our practices — strengthening our commitment to leave the world better than we found it.

About Apple

There’s a place here for every kind of brilliant. Everyone here is an innovator, or an innovator-to-be, no matter what your team or your role. So bring your passion, courage, and original thinking and get ready to share it, because every new product, service, or feature we invent is the result of people working together to make each others’ ideas stronger. Innovation at this level depends on people who represent the variety of the human experience and inspire us with their own fresh perspectives. Together, we’ll do amazing work that can make a difference in people’s lives. Including your own. Learn more about working at Apple.

COMPANY SIZE
10,000 employees or more
INDUSTRY
Computer/IT Services
FOUNDED
1976
WEBSITE
https://www.apple.com/jobs