Digital transformation is profoundly reshaping interactions among individuals, organisations, and technologies, thereby highlighting the need for innovative solutions to address complex and constantly evolving challenges. This study explores the transformative potential of a systematic approach to user experience design in software development processes. The case of ManyDesigns, an Italian software development company, is employed to illustrate the points made. The project under scrutiny is a digital platform for hospital registration and payment that was initially developed without design support and is affected by several limitations. The redesign process was led by specialists in user experience and accessibility, and was grounded in methodologies derived from human–computer interaction. The process was further enriched by the integration of usability principles and accessibility guidelines. An experimental study was conducted in which the original and redesigned versions were subjected to an A/B test. The results of the test revealed significant improvements in clarity, simplicity, and user satisfaction. The findings emphasise the value of early involvement of design professionals in development processes, fostering inclusive and sustainable digital solutions. This approach has been demonstrated to reduce revision costs, enhance collaboration among interdisciplinary teams, and improve overall efficiency.