Sr. Machine Learning Engineer - LLMs, Agent Systems, And Simulation Tooling, Siri Core Modeling

Department Icon Data Science Analytics & Machine Learning
149+ Applicants
Posted: 6 months ago
4-6 years
Seattle, Washington, United States
work from office

Posted: 6 months ago
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Applicants: 149+
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Job Description

We’re looking for a senior software engineer with a strong proficiency in ML systems and large language models to help build advanced reasoning capabilities for the Siri virtual assistant. We are a collaborative team of ML engineers, scientists, and software developers passionate about LLM planner modeling to build the next generation of the Siri virtual assistant. Your work will center on developing reliable, scalable tooling for training, simulation, and evaluation of LLMs and agentic systems. You’ll also play a hands-on role in designing and running experiments in simulation, and integrating client-side components with backend systems into a production-ready testable environment. This is an opportunity to work with pioneering technologies that push the boundaries of LLM agent reasoning, system architecture, and rapid iteration. You’ll collaborate closely with ML developers, client-side engineers, and deep learning leaders to bring enhanced LLM reasoning capabilities into production.
  • Bachelors degree in Computer Science or related quantitative field, with at least 4+ years of relevant industry experience with the following:
  • 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
  • Looking to get Placed? Try our Placement Guarantee Plan

    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 filed is preferred

Skills

PythonDebuggingTestingSoftware Engineer

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About Company

Apple Inc., formerly Apple Computer, Inc., is a Silicon Valley–based multinational technology company headquartered in Cupertino, California. It designs, manufactures, and markets premium consumer electronics, software, and online services. Iconic products include the iPhone, iPad, Mac, Apple Watch, and Apple TV, alongside services such as Apple Music, iCloud, Apple Pay, Apple Arcade, Apple TV+, and the App Store. Operating systems now span iOS, iPadOS, macOS, watchOS, and visionOS.

As of August 2025, Apple ranks #3 globally by market capitalization (≈ US $3.4 trillion) and reported FY 2024 revenue of US $391 billion. It remains the second‑largest smartphone maker and fourth‑largest PC vendor worldwide, while expanding into AI‑powered devices, sustainable technology solutions, and mixed‑reality platforms like the Apple Vision Pro.

For professionals exploring Apple India careers, the company offers opportunities across hardware, software, design, retail, and operations, with office hubs in Bengaluru, Hyderabad, Mumbai, and Gurugram. Apple’s interview process in India is known for its rigor, cultural fit focus, and innovation‑driven assessment — attracting engineers, designers, and business talent passionate about shaping future‑ready technology.

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Important dates & deadlines?

Application Deadline

19 Dec 25, 07:00 PM IST

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Sr. Machine Learning Engineer - LLMs, Agent Systems, And Simulation Tooling, Siri Core Modeling

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