Senior Machine Learning Engineer, Proactive

Apple is seeking a Senior Machine Learning Engineer to build intelligent search and proactive AI experiences across its ecosystem. This role focuses on designing, training, and deploying transformer-based large language models, semantic retrieval, and ranking systems for on-device and personalized search. The engineer will research model compression, quantization, and low-latency inference, and partner with cross-functional teams to ship AI features from research to production.

• Design, train, fine-tune, and optimize transformer-based language models for on-device deployment.
• Build semantic retrieval, embedding, reranking, and retrieval-augmented generation systems to improve search quality and AI-powered experiences.
• Develop models for query understanding, intent prediction, personalization, and ranking.
• Research new approaches to model compression, quantization, and low-latency inference.
• Partner with engineers, researchers, product managers, and designers to bring AI capabilities from research into production, driving technical strategy and leading projects from exploration to large-scale deployment.

• Bachelor's degree in Computer Science, Machine Learning, Artificial Intelligence, or a related field.
• 5+ years of industry or research experience developing machine learning systems.
• Background in machine learning, deep learning, natural language processing, information retrieval, search, recommender systems, or generative AI.