An Agilent ADS developer specializes in using the Advanced Design System (ADS), a software tool developed by Agilent. This tool is used for high-frequency, high-speed complex design simulation. The developer's tasks include designing, simulating, and validating electronic and electromagnetic systems before physical prototyping. They work on components like RF, microwave, high speed digital, signal integrity, power electronics, and more. They analyze system performance, troubleshoot issues, and refine designs based on simulation results. They also collaborate with engineers and other stakeholders to ensure system requirements are met, and provide technical support when implementing the design into a physical product.