Engineering is not just a profession, but a special mindset that allows one to see structure and logic where others see only chaos. On May 13th, the world community celebrates Global Engineering Day (IEEE Global Engineering Day), a holiday for those who design our future, build bridges between theory and reality, and transform abstract ideas into working mechanisms. In recent years, the professional identity of engineers has found its reflection in the art of body painting: engineering tattoos have become a powerful trend, combining the aesthetics of precise sciences with the philosophy of creation. This is not just decoration, but a kind of manifesto of rationality, embodied in lines that are no less precise than project documentation.