Apple · 3 hours ago
Sr. Machine Learning Engineer – LLMs, Agent Systems, and Simulation Tooling, Siri Core Modeling
Sunnyvale, CA
Full-time
Onsite
Mid, Senior Level
$147K/yr - $272K/yr
4+ years expApple is a pioneering company shaping the future of voice-first, agentic platforms. As a Senior Machine Learning Engineer, you will develop scalable reasoning systems for intelligent agents, focusing on simulation capabilities and robust infrastructure for training and evaluation.
AppsArtificial Intelligence (AI)BroadcastingDigital EntertainmentFoundational AIMedia and EntertainmentMobile DevicesOperating SystemsTVWearables
Responsibilities
Define how next-generation intelligent agents reason, plan, and interact with people through natural voice and multimodal experiences
Develop the foundations of scalable LLM reasoning systems that will power the next wave of human–AI interaction
Build the core reasoning and simulation capabilities behind a future platform for agentic voice experiences
Advance how LLMs plan, adapt, and evaluate actions in realistic environments
Contribute to the development of reliable and trustworthy AI agents
Develop robust infrastructure and tooling for training, simulation, and evaluation of agentic LLMs
Design and run experiments in simulated environments
Build scalable evaluation pipelines
Help integrate agent behaviors across client and backend systems
Collaborate closely with ML scientists, applied researchers, and product engineers to transform early research into deployable systems
Qualification
Required
Bachelor's degree in Computer Science, Machine Learning, or related quantitative field, with 4+ years of relevant industry experience
Strong skills in Python (preferred) and at least one other programming language
Proven experience in ML engineering, including system design, training pipelines, and deployment workflows
Deep understanding of agent-based simulation, agentic RAG systems, and LLM evaluation methodologies
Ability to balance long-term platform vision with pragmatic short-term delivery in fast-paced environments
Preferred
Experience deploying LLM models in research or production contexts
Knowledge of adaptive feedback loops, reinforcement learning, or interactive agent design
Familiarity with client-backend integration for AI-driven applications
MS or PhD in Computer Science, Machine Learning, or a related 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
Apple has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
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Trends of Total Sponsorships
2025 (6998)
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2023 (3939)
2022 (4822)
2021 (4060)
2020 (3656)
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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2025-12-01
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Mac Daily News
2025-09-25
Company data provided by crunchbase