As AI becomes more deeply embedded in products and services, designers have a growing responsibility to help ensure that technology reflects human values, ethics, and societal needs. Building trustworthy AI requires close collaboration between design, research, engineering, and governance, with values such as privacy, transparency, and safety translated into concrete decisions throughout the development process. A human-centered approach treats design as the connective thread that helps teams align strategy, implementation, and outcomes while continuously evaluating whether systems deliver on the promises made to users and society.