Participate in defining, designing, developing, and bringing 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 teams to implement new circuits and sub-systems and drive them into production. Define production and bench-top test-plans, analyze results, and drive Design of Experiments (DOEs). Create integration guides and user documents, and generally assist with challenges in successfully implementing the new circuits and sub-systems into complex Systems on Chips (SoCs).