Participate in defining, designing, developing, and taking to production analog and mixed-signal circuits and sub-systems within Apple integrated circuit devices. Specify, design, implement, and verify analog and mixed-signal circuits and sub-systems, including transistor-level analog circuits, mixed-signal interfaces, and digital control and signal processing blocks. Develop and run high-level simulations to validate top-level integration. Engage with cross-functional analog, digital, DV, firmware, software, SoC architecture, technology, packaging, silicon validation, production test, manufacturing, and other teams to implement the new circuits and sub-systems and drive them into production. Define production and bench-top test-plans, analyze results, and drive DOEs. Create integration guides and user documents, and generally assist with challenges in successfully implementing the new circuits and sub-systems into complex SoCs.