Senior iOS Engineer: On-Device AI & LLM Agents

Apple Inc.; Sunnyvale (CA); On-site; USD 185,000 - 325,000; Full time

Benefits offered by this job

Stock purchase plan

Discretionary bonuses

Education reimbursement

Relocation assistance

Medical and dental coverage

Tuition reimbursement

Job summary

Apple Inc. seeks a senior iOS Software Engineer to design and build on‑device AI powered applications and scalable architectures. You will craft the foundation for integrating powerful LLM agents while prioritizing user privacy and performance on Apple devices.

The role emphasizes hands-on development, architecture definition, and collaboration across teams to create a new class of on‑device experiences for millions of users.

Qualifications

• BS degree in Computer Science or related field; 10+ years of professional software development experience.
• Expert-level experience building high-performance, consumer-facing mobile applications and frameworks.
• Proficiency in modern systems programming languages (C++, Objective-C/Swift, Rust).
• Deep understanding of mobile system fundamentals: concurrency, memory management, and power optimization.
• Knowledge of how LLM-powered systems work, including agent frameworks and RAG architectures.
• Proficiency in AI-assisted development workflows and tackling architectural trade-offs.

Responsibilities

• Architect and build innovative, high-performance on-device apps that showcase the power of intelligent LLM agents.
• Design client-side frameworks and architectural patterns for integrating LLM systems efficiently on iOS.
• Implement software that connects user-facing apps to on-device and hybrid AI reasoning and planning engines.
• Rapidly build and iterate on application prototypes to explore new user interactions and architectural options.

Skills

Mobile app development

C++

Objective-C/Swift

Rust

Concurrency

Memory management

AI/LLM integration

Debugging/architecture trade-offs

Education

BS degree in Computer Science or related

Tools

Core ML

Foundation Model

SwiftUI

iOS frameworks

LLM agent frameworks

Job description

Apple Inc. seeks a senior iOS Software Engineer to design and build on‑device AI powered applications and scalable architectures. You will craft the foundation for integrating powerful LLM agents while prioritizing user privacy and performance on Apple devices.

The role emphasizes hands-on development, architecture definition, and collaboration across teams to create a new class of on‑device experiences for millions of users.