Apple · 6 hours ago
Sr. Machine Learning Engineer - LLMs, Agent Systems, and Simulation Tooling, Siri Core Modeling
Seattle, WA
Full-time
Onsite
Mid, Senior Level
$172K/yr - $302K/yr
4+ years expApple is seeking a Senior Machine Learning Engineer to join the Siri Planner team, playing a pivotal role in the development of advanced reasoning capabilities for the Siri virtual assistant. The role involves collaborating with a team of ML engineers and software developers to create reliable tooling for LLMs and agentic systems.
AppsArtificial Intelligence (AI)BroadcastingDigital EntertainmentFoundational AIMedia and EntertainmentMobile DevicesOperating SystemsTVWearables
Responsibilities
Contribute to revolutionizing how millions of Siri users worldwide interact with their Apple devices by working on groundbreaking technologies for LLM model reasoning
Help build advanced reasoning capabilities for the Siri virtual assistant
Develop reliable, scalable tooling for training, simulation, and evaluation of LLMs and agentic systems
Design and run experiments in simulation, and integrate client-side components with backend systems into a production-ready testable environment
Collaborate closely with ML developers, client-side engineers, and deep learning leaders to bring enhanced LLM reasoning capabilities into production
Qualification
Required
Bachelor's degree in Computer Science or related quantitative field
At least 4+ years of relevant industry experience
Strong skills in Python (desired) and at least one other object-oriented programming language
Proven experience in software engineering, including system design, development, testing, debugging, release and maintenance
In-depth understanding of agent-based simulation frameworks, Agentic RAG systems, prompt engineering, and evaluation best practices for LLMs
Ability to develop long-term strategic visions and implement scalable solutions in fast-paced, agile work environments
Preferred
Experience supporting ML teams or deploying LLM models in production or research
Knowledge of feedback mechanisms and adaptive agent behaviors
Experience integrating client-side applications or code with backend systems (APIs or custom protocols)
MS or advanced degree in Computer Science, Machine Learning or related quantitative field
Benefits
Comprehensive medical and dental coverage
Retirement benefits
A range of discounted products and free services
Reimbursement for certain educational expenses — including tuition
Discretionary bonuses or commission payments
Relocation
Company
Apple
Apple is a technology company that designs, manufactures, and markets consumer electronics, personal computers, and software.
10001+ employees
H1B Sponsorship
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Funding
Current Stage
Public CompanyTotal Funding
$5.67BKey Investors
Berkshire HathawayMicrosoftSequoia Capital
2025-05-05Post Ipo Debt· $4.5B
2025-01-16Post Ipo Debt· $0.31M
2021-04-30Post Ipo Equity
Leadership Team
Tim Cook
CEO
Craig Federighi
SVP, Software Engineering
Recent News
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2025-09-25
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