An RF Design Engineer specializes in designing and developing radio frequency (RF) systems and components, typically for wireless communication devices. They work on creating efficient and reliable RF circuits, antennas, and systems that transmit and receive signals effectively. RF Design Engineers use their expertise in electromagnetic theory and RF principles to optimize signal performance, minimize interference, and ensure compliance with regulatory standards. Their work is crucial in industries like telecommunications, aerospace, and electronics, where RF technology is vital for wireless communication and connectivity.