Senior iOS Systems Engineer — Generative AI Services

Apple; United States; On-site; USD 180,000 - 260,000; Full time

Job summary

Apple is seeking a senior iOS frameworks engineer to design on-device systems powering Generative AI experiences across Apple platforms. You will own foundational frameworks, daemons, and APIs that run beneath the UI, enabling scalable, reliable features.

The role emphasizes cross-team collaboration, performance tuning, energy efficiency, CloudKit data synchronization, and robust telemetry. You will mentor engineers and help shape technical direction.

Qualifications

• Bachelor's or Master's degree in Computer Science or a related field.
• 6+ years of software engineering experience on client-side or platform-level iOS systems.
• Strong proficiency in Swift and Objective-C, with experience shipping production-quality frameworks, daemons, or system APIs.
• Strong systems programming expertise, including concurrency, multithreading, memory management, and performance tuning.
• Understanding of systems-level concepts such as inter-process communication (XPC), process lifecycle management, and resource constraints.
• Experience integrating client applications with RESTful APIs and cloud services.
• Proficiency with development tools such as Xcode, LLDB, Instruments, and Git.
• Strong communication skills, including the ability to collaborate across a diversity of backgrounds and experiences.
• Highly organized, maintaining patience and composure to effectively operate within ambiguity.
• Experience with CloudKit or similar distributed data synchronization technologies.
• Experience designing and delivering libraries, frameworks, or public/internal APIs.
• Strong debugging skills across the OS stack - frameworks, daemons, and supporting services.
• Experience optimizing software for performance, energy efficiency, and resource constraints on mobile platforms.
• Familiarity with metrics and telemetry frameworks, including instrumentation, data collection pipelines, and analytics.
• Experience with AI/ML principles or developing software that interfaces with large language models.
• Experience with SQL and database technologies.
• Track record of mentoring engineers and driving technical direction within a team.

Responsibilities

• Designing and implementing frameworks, daemons, and system services that form the backbone of Services experiences on Apple platforms
• Building efficient inter-process communication layers using XPC to enable secure, performant data exchange between system components
• Architecting and implementing CloudKit-based data synchronization to deliver seamless cross-device experiences
• Designing robust interfaces to REST endpoints and backend services, ensuring reliability and graceful degradation
• Building and maintaining metrics and telemetry frameworks to measure feature health, performance, and user engagement
• Driving architectural decisions across the team, participating in peer review of architecture, API design, and individual software changes
• Mentoring and supporting other engineers on the team, raising the bar for engineering quality and technical depth

Skills

Swift

Objective-C

Concurrency

Multithreading

Memory management

Inter-process communication (XPC)

REST APIs

Cloud services

Git

Xcode

LLDB

Instruments

Public/internal APIs

Debugging

Performance optimization

SQL/Databases

AI/ML principles

Mentoring

Education

Bachelor's or Master's degree in Computer Science or a related field

Tools

Xcode

LLDB

Instruments

Git

Job description

Apple is seeking a senior iOS frameworks engineer to design on-device systems powering Generative AI experiences across Apple platforms. You will own foundational frameworks, daemons, and APIs that run beneath the UI, enabling scalable, reliable features.

The role emphasizes cross-team collaboration, performance tuning, energy efficiency, CloudKit data synchronization, and robust telemetry. You will mentor engineers and help shape technical direction.