Riki has worked primarily in the world of publishing illustration. Since the beginning of his professional career in 2000 he has illustrated more than twenty books. He has done press illustrations, as well as coordinating the illustrations for many magazines. He co-founded and co-edited the illustrated magazine Garabattage in 2001, and founded and edited the publication project, Fràgil.
He has also created posters and book covers, as well worked as a graphic designer. He has illustrated CDs for some musical groups, worked on animation projects, created the scenery and designed the wardrobe for operas, and is the artistic consultant for a contemporary dance company.