His work encompasses architecture, interior design, product design, and art direction, with projects spanning residential, hospitality, and commercial sectors. In recent years, he has also ventured into yacht design, collaborating with companies in the nautical industry.

Fantolino's design philosophy emphasizes creating unique and exclusive solutions tailored to each client's needs. His projects are characterized by a strong identity, blending elegance, design, and technical expertise. He has collaborated with various furniture companies, contributing to product design and serving as art director.

Notable collaborations include partnerships with brands such as Miniforms, Ex.t, and Gebrüder Thonet Vienna, where he has contributed to product design and development.