On-Device AI Engineer for Siri Platform

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

Benefits offered by this job

Medical and dental coverage

Retirement benefits

Educational reimbursement

Employee stock programs

Job summary

Apple Inc. is building the on-device runtime that powers Siri across iOS and macOS.

As a Software Engineer on the App Intelligence team, you'll shape private, fast, and reliable interactions by designing interfaces, implementing scalable components, and working with partners to bring new app capabilities to life on-device. You will tackle challenging performance, memory, and latency constraints, collaborate across platforms, and contribute to tool-calling and context construction for real-time

Qualifications

• BS or MS in Computer Science or equivalent practical experience.
• Strong proficiency in C++, Swift, or Objective-C with solid OO design principles.
• Strong understanding of OS internals, concurrency, multithreading, and memory management.
• Familiarity with Large Language Models (LLMs) and AI assistants, with fluency in agentic coding tools such as Claude Code.
• Experience with system performance analysis and optimization techniques.
• Ability to work independently, solve complex problems, and learn new technologies quickly.
• Excellent communication skills, with experience collaborating across different technical teams and driving alignment on shared API surfaces.

Responsibilities

• Design, develop, and maintain the robust on-device runtime platform that enables end-to-end Siri experiences.
• Implement code that is well-designed, scalable, maintainable, highly testable, easy to debug, and highly performant, ensuring best practices in engineering.
• Contribute to and help shape key architecture decisions that enable the product to scale.
• Debug, profile, and optimize system performance to ensure high-quality, responsive interactions, holding on-device latency, memory, and power budgets.
• Diagnose failures in end-to-end Siri experiences, and turn them into measurable quality and reliability improvements in the platform.
• Contribute to the shared evaluation and telemetry loop that proves whether a platform change improved user outcomes.
• Design and evolve the interfaces between the runtime and the model — tool and function-calling schemas, context construction, and validation of model output — so that what the planner decides is executed reliably.

Skills

C++

Swift

Objective-C

OS internals

Multithreading

Memory management

LLMs

Claude Code

Python

SQL

Education

BS or MS in Computer Science

Tools

Xcode

Apple platforms

Claude Code

Python

SQL

Job description

Apple Inc. is building the on-device runtime that powers Siri across iOS and macOS.

As a Software Engineer on the App Intelligence team, you'll shape private, fast, and reliable interactions by designing interfaces, implementing scalable components, and working with partners to bring new app capabilities to life on-device. You will tackle challenging performance, memory, and latency constraints, collaborate across platforms, and contribute to tool-calling and context construction for real-time