On-Device AI Platform Engineer for Siri

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

Benefits offered by this job

Medical and dental coverage

Retirement benefits

Apple stock programs

Tuition reimbursement

Relocation assistance

Job summary

Apple seeks seasoned AI Software Engineers to build the on-device Siri platform that powers apps across iOS, iPadOS, macOS, watchOS, and visionOS. You will design and implement the on-device runtime required for end-to-end Siri experiences, shaping architecture and ensuring fast, reliable performance through collaborating with internal teams and real app partners.

Join a team that tackles ambiguity, defines interfaces, and proves concepts with working software and measurable results, influencing

Qualifications

• BS or MS in Computer Science or equivalent practical experience, with 5+ years developing and shipping production software.
• Strong proficiency in C++, Swift, or Objective-C, with a solid understanding of object-oriented programming and software design principles.
• Strong understanding of OS internals, concurrency, multithreading, and memory management.
• Strong familiarity with Large Language Models (LLMs) and AI assistants, with fluency in agentic coding tools such as Claude Code, and good judgment about where to apply them and how to verify what they produce.
• 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/ObjC

LLMs & AI assistants

OS internals

Performance optimization

Independent problem solving

Cross-team communication

Education

BS/MS in Computer Science

Job description

Apple seeks seasoned AI Software Engineers to build the on-device Siri platform that powers apps across iOS, iPadOS, macOS, watchOS, and visionOS. You will design and implement the on-device runtime required for end-to-end Siri experiences, shaping architecture and ensuring fast, reliable performance through collaborating with internal teams and real app partners.

Join a team that tackles ambiguity, defines interfaces, and proves concepts with working software and measurable results, influencing