As a Senior Machine Learning Engineer, you will lead initiatives to significantly advance Siri’s natural language understanding and planning capabilities using innovative LLM technologies.YOUR CORE RESPONSIBILITIES WILL INCLUDE:• Developing innovative systems for synthetic training data generation and implementing strategies for the continuous optimization of model performance.• Designing and implementing agentic workflows and RAG systems to enhance Siri’s capabilities.• Optimizing model performance for tool calling and reasoning tasks.• Actively staying at the forefront of academic and industry research in LLMs, NLP, and agentic systems, and translating novel insights into practical solutions.• Collaborating closely with a multidisciplinary team of researchers, software engineers, and product designers to seamlessly integrate AI innovations into the Siri user experience.