As a Sr. Software Engineer for Siri Response, you will be delivering new natural language capabilities using cutting-edge Machine Learning techniques. This involves exploring how technology can create innovative user experiences, learning about new models, and productizing them to run on all Apple hardware. You will design systems to support model inference with overrides and asset downloads, build cloud-based services, and develop client protocols. Analyzing performance and optimizing in complex multi-process environments will also be part of your responsibilities.