Participate in the definition, design, development, and production of analog and mixed-signal circuits and sub-systems within Apple integrated circuit devices. This includes specifying, designing, implementing, and verifying these circuits at the transistor level, as well as mixed-signal interfaces and digital control and signal processing blocks. The role involves developing and running high-level simulations for top-level integration, collaborating with various teams (analog, digital, DV, firmware, software, SoC architecture, technology, packaging, silicon validation, production test, manufacturing, etc.) to implement and bring new circuits and sub-systems to production, and creating integration guides and user documents. The engineer will also define test plans, analyze results, and assist with implementing circuits into complex SoCs.