A Mixed-Signal IC Design developer designs and develops integrated circuits that process both analog and digital signals. They utilize computer-aided design tools to draw circuit schematics and layout designs, then test and analyze the performance of these mixed-signal circuits. They also troubleshoot issues, optimize designs for performance and efficiency, and coordinate with other engineers to integrate their designs into larger systems. Their work is vital in creating ICs for various applications such as telecommunications, consumer electronics, and medical devices. They must have a deep understanding of both analog and digital circuits, semiconductor physics, and signal processing.