Senior Machine Learning Engineer – LLMs, Agent Systems, and Simulation Tooling
Apple
Full-time
On-site
Sunnyvale, California, United States
AI and Machine Learning
We’re seeking a senior ML engineer with strong expertise in large language models and agent-based systems to build the core reasoning and simulation capabilities behind a future platform for agentic voice experiences. You will work on advancing how LLMs plan, adapt, and evaluate actions in realistic environments, contributing to the development of reliable and trustworthy AI agents.
Your work will focus on developing robust infrastructure and tooling for training, simulation, and evaluation of agentic LLMs. You’ll design and run experiments in simulated environments, build scalable evaluation pipelines, and help integrate agent behaviors across client and backend systems. This role is an opportunity to push the boundaries of reasoning, adaptive behavior, and platform architecture for agent-based intelligence.
You will collaborate closely with ML scientists, applied researchers, and product engineers to transform early research into deployable systems. Together, we will shape a platform that empowers developers and end-users to build rich, voice-driven AI experiences.
- 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
- 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