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
78 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 to 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 through rapid prototyping and cross-functional collaboration. 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 by building systems with personal context understanding and on-screen awareness while navigating specific on-device compute constraints to create deeply personalized autonomous technologies.

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.
  • Influence platform strategy and define technical directions 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.

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