Apple is seeking a Staff Software Engineer specializing in Applied ML/LLM to advance their Manufacturing Systems and Operations. This role focuses on working with cutting-edge LLMs from OpenAI, Anthropic, Gemini, Mistral, and Llama, as well as custom fine-tuned models. The position involves building applications used daily by Apple's product design and manufacturing teams, including Manufacturing Design Engineers, Product Designers, Mechanical Engineers, and Quality Engineers. The ideal candidate will have extensive experience in building robust HTTP APIs, working with modern programming languages, and implementing LLM solutions. They will be responsible for prototyping ideas, developing scalable solutions, and collaborating across multiple organizations. The role offers competitive compensation, comprehensive benefits, and the opportunity to work on high-impact projects at one of the world's leading technology companies. The position requires international travel (5-10%) and combines technical expertise with practical manufacturing applications.