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

Apple

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

Apple logo

Apple

full-time

Posted: November 3, 2025

Number of Vacancies: 1

Job Description

Join the Siri Planner team as a senior experienced Software Engineer and play a pivotal role in crafting the future of virtual assistants. You’ll contribute to revolutionizing how millions of Siri users worldwide interact with their Apple devices by working on groundbreaking technologies for LLM model reasoning. 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.

Locations

  • Seattle, Washington, United States 98117

Salary

Estimated Salary Rangemedium confidence

50,000,000 - 90,000,000 INR / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • proficiency in ML systemsintermediate
  • proficiency in large language modelsintermediate
  • LLM model reasoningintermediate
  • LLM planner modelingintermediate
  • developing reliable scalable toolingintermediate
  • training LLMsintermediate
  • simulation of LLMsintermediate
  • evaluation of LLMsintermediate
  • agentic systemsintermediate
  • designing experimentsintermediate
  • running experiments in simulationintermediate
  • integrating client-side componentsintermediate
  • backend systemsintermediate
  • system architectureintermediate
  • rapid iterationintermediate
  • collaboration with ML developersintermediate
  • collaboration with client-side engineersintermediate
  • collaboration with deep learning leadersintermediate

Required Qualifications

  • Bachelor's degree in Computer Science or related quantitative field, with at least 4+ years of relevant industry experience with the following: (experience, 4 years)
  • Strong skills in Python (desired) and at least one other object-oriented programming language (experience)
  • Proven experience in software engineering, including system design, development, testing, debugging, release and maintenance (experience)
  • In-depth understanding of agent-based simulation frameworks, Agentic RAG systems, prompt engineering, and evaluation best practices for LLMs (experience)
  • Ability to develop long-term strategic visions and implement scalable solutions in fast-paced, agile work environments (experience)

Preferred Qualifications

  • Experience supporting ML teams or deploying LLM models in production or research (experience)
  • Knowledge of feedback mechanisms and adaptive agent behaviors (experience)
  • Experience integrating client-side applications or code with backend systems (APIs or custom protocols) (experience)
  • MS or advanced degree in Computer Science, Machine Learning or related quantitative filed is preferred (degree in advanced degree in computer science)

Responsibilities

  • 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.

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Apple logo

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

Apple

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

Apple logo

Apple

full-time

Posted: November 3, 2025

Number of Vacancies: 1

Job Description

Join the Siri Planner team as a senior experienced Software Engineer and play a pivotal role in crafting the future of virtual assistants. You’ll contribute to revolutionizing how millions of Siri users worldwide interact with their Apple devices by working on groundbreaking technologies for LLM model reasoning. 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.

Locations

  • Seattle, Washington, United States 98117

Salary

Estimated Salary Rangemedium confidence

50,000,000 - 90,000,000 INR / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • proficiency in ML systemsintermediate
  • proficiency in large language modelsintermediate
  • LLM model reasoningintermediate
  • LLM planner modelingintermediate
  • developing reliable scalable toolingintermediate
  • training LLMsintermediate
  • simulation of LLMsintermediate
  • evaluation of LLMsintermediate
  • agentic systemsintermediate
  • designing experimentsintermediate
  • running experiments in simulationintermediate
  • integrating client-side componentsintermediate
  • backend systemsintermediate
  • system architectureintermediate
  • rapid iterationintermediate
  • collaboration with ML developersintermediate
  • collaboration with client-side engineersintermediate
  • collaboration with deep learning leadersintermediate

Required Qualifications

  • Bachelor's degree in Computer Science or related quantitative field, with at least 4+ years of relevant industry experience with the following: (experience, 4 years)
  • Strong skills in Python (desired) and at least one other object-oriented programming language (experience)
  • Proven experience in software engineering, including system design, development, testing, debugging, release and maintenance (experience)
  • In-depth understanding of agent-based simulation frameworks, Agentic RAG systems, prompt engineering, and evaluation best practices for LLMs (experience)
  • Ability to develop long-term strategic visions and implement scalable solutions in fast-paced, agile work environments (experience)

Preferred Qualifications

  • Experience supporting ML teams or deploying LLM models in production or research (experience)
  • Knowledge of feedback mechanisms and adaptive agent behaviors (experience)
  • Experience integrating client-side applications or code with backend systems (APIs or custom protocols) (experience)
  • MS or advanced degree in Computer Science, Machine Learning or related quantitative filed is preferred (degree in advanced degree in computer science)

Responsibilities

  • 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.

Target Your Resume for "Sr. Machine Learning Engineer - LLMs, Agent Systems, and Simulation Tooling, Siri Core Modeling" , Apple

Get personalized recommendations to optimize your resume specifically for Sr. Machine Learning Engineer - LLMs, Agent Systems, and Simulation Tooling, Siri Core Modeling. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Sr. Machine Learning Engineer - LLMs, Agent Systems, and Simulation Tooling, Siri Core Modeling" , Apple

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

Hardware

Related Jobs You May Like

No related jobs found at the moment.