In the 1950s, De Carli began to concentrate on furniture design, creating elegant, modern pieces for Italy's most famous manufacturers, such as Cassina and Tecno. He also worked on interior architecture projects for public and private buildings, including apartments, hotels and offices.
De Carli's style is characterized by understated elegance, simplicity and attention to detail. His furniture and interiors are often associated with the minimalist aesthetics of Italian design in the 1950s and 1960s.
Over the course of his career, De Carli received numerous awards and distinctions for his work, including the prestigious Compasso d'Oro in 1955 and 1960. Today, his furniture and interior architecture projects are considered emblematic examples of modern Italian design.