Principal Applied Research Engineer Scientist

Apple Inc

Confirmed live 2 days ago High trust

Quick summary

Work type
On-site
Location
Cupertino, CA
Salary
$216,200–$394,000 / yr
Posted
180 days ago
Freshness
Confirmed live 2 days ago

Market check

Salary context

Above market

How this pay compares to similar roles

Similar $234k
This role $305k
$160k most similar roles pay here $419k

This role pays more than 85% of similar roles. Most pay $196,750–$270,500 — the shaded band above. At the midpoint, this role pays about $305k versus about $234k for comparable roles.

Based on 240 similar postings.

Employer

About Apple Inc

Apple Inc. is a multinational technology company known for designing and manufacturing consumer electronics, software, and online services, including the iPhone, Mac, iPad, and App Store. Industry: Consumer Electronics & Software

Apple Inc currently has 1984 open roles on FindRole.

Listed pay typically runs $175,000–$277,600 across 1590 roles with salary data.

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At a glance

TL;DR · Principal Applied Research Engineer Scientist

As a Principal Applied Research Engineer/Scientist, Siri Labs, you will join the Siri organization to develop next-generation intelligent architectures and advanced machine learning systems. You will be responsible for advancing self-improving systems that adapt via deployment signals, designing agentic memory frameworks for long-horizon reasoning, and architecting personalized autonomous multi-agent systems capable of task decomposition and tool use. Your daily work involves translating foundational research into scalable product experiences while influencing platform strategy across hardware and software. You will utilize expertise in transformer-based LLMs, multi-modal foundation models involving text, vision, and audio, and the full model lifecycle including pre-training, fine-tuning, and safety alignment. The role focuses on solving complex user problems through autonomous systems that provide contextual continuity and personalized experiences while navigating specific on-device compute constraints within a personal assistant ecosystem.

What you'll do

  • Develop self-improving systems that learn from deployment signals and optimize performance autonomously in real-world environments.
  • Design and operationalize agentic memory frameworks to enable long-horizon reasoning and contextual continuity.
  • Architect autonomous multi-agent systems capable of task decomposition, tool use, and dynamic collaboration.
  • Translate foundational machine learning research into validated user experiences and production-ready architectures.
  • Lead rapid prototyping to move advanced AI concepts into scalable product features.
  • Define technical direction and influence platform strategy for integrated hardware and software systems.
  • Optimize large language models and multi-modal foundation models for on-device compute constraints.

What we're looking for

  • Hold an MSc or PhD in Computer Science, Machine Learning, or a related field.
  • Possess equivalent practical experience delivering zero-to-one LLM productization.
  • Demonstrate deep expertise in transformer-based LLMs and multi-modal foundation models.
  • Show proficiency in integrating text, vision, and audio with cross-modal attention.
  • Exhibit hands-on mastery of the model lifecycle including pre-training, fine-tuning, optimization, and safety alignment.
  • Possess expertise in designing AI agents for complex reasoning under on-device compute constraints.
  • Demonstrate the ability to influence high-level architecture decisions and advocate for research directions to leadership.

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