Apple
Principal Applied Research Engineer/Scientist, Siri Labs
$216K–$394K
Cupertino, California · Principal · Full-time · Posted Sep 10, 2026
- Education
- MSc or PhD in Computer Science, Machine Learning, or related field; or equivalent practical experience delivering zero-to-one LLM productization.
About the job
Leads research and product development for personalized, autonomous AI systems that learn from use, reason over persistent memory, and coordinate across agents for Siri and Apple platforms.
What you'll do
- Develop self-improving systems and agentic memory frameworks for adaptive learning, long-horizon reasoning, and personalization.
- Architect multi-agent systems with coordination, task decomposition, and tool use; translate research into validated user experiences and production-ready systems.
- Partner across teams to shape technical direction and deliver scalable ML systems integrated with hardware, software, and services.
What they ask for
- MSc or PhD in Computer Science, Machine Learning, or related field; or equivalent practical experience delivering zero-to-one LLM productization.
- Deep expertise in transformer-based LLMs and multi-modal foundation models, integrating text, vision, and audio with cross-modal attention.
- Hands-on mastery of pre-training, fine-tuning, performance optimization, and safety alignment.
- Expertise designing AI agents for complex reasoning under on-device compute constraints.
Nice to have
- Ability to influence high-level architecture decisions and advocate for research directions to product leadership.
Pay
USD $216,200 to $394,000 base salary
Tools
transformer-based LLMs, multi-modal foundation models, text, vision, audio, cross-modal attention
AI focus
Research and develop self-improving systems, persistent agentic memory, personalized autonomous multi-agent systems, and advanced ML capabilities for Siri and Apple platforms.
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