The Principal Applied Research Engineer at Apple will integrate foundational AI research with advanced hardware and software to create transformative user experiences. This role focuses on driving innovation in self-improving systems and personalized autonomous multi-agent systems. The engineer will work on next-generation intelligent architectures that learn continuously and reason over persistent memory. This position offers the opportunity to influence high-level architecture decisions and advocate for novel research directions.

• MSc or PhD in Computer Science, Machine Learning, or a related field, or equivalent practical experience in LLM productization.
• Deep expertise in transformer-based LLMs and multi-modal foundation models, particularly in integrating text, vision, and audio.
• Hands-on mastery across the model lifecycle, including pre-training, fine-tuning, performance optimization, and safety alignment.
• Expertise in designing AI agents for complex reasoning under on-device compute constraints.
• Demonstrated ability to influence high-level architecture decisions and advocate for research directions.

• Drive breakthrough innovation across self-improving systems and deeply personalized autonomous multi-agent systems.
• Shape next-generation intelligent architectures that learn continuously and retain persistent memory.
• Coordinate across agents to enhance the functionality of AI systems.
• Translate frontier research into scalable product experiences.
• Collaborate with product leadership to advocate for novel research directions.

• Employees at Apple are often offered comprehensive benefits that support physical and mental well-being—flexible medical plans, confidential counseling, onsite wellness centers at major campuses, and resources for fitness and daily life. Families typically receive fertility support, paid parental leave with gradual return, caregiving leave, and dependent-care guidance, while financial perks commonly include stock grants (with purchase discounts), 401(k) matching, and income-protection coverage. Employees also see robust time off, Apple University learning and tuition reimbursement, donation matching and paid volunteer hours, and deep product and partner discounts.