Walter Junior started his career as illustrator and comic books creator in 1988. He published the SAGA fanzine for six years, winning two "HQMIX" awards in 1990 and 1992. Created the characters Overgirl and Feedback in 1989. In 1994, won the "Angelo Agostini Award "and the 1994 Nova Award with the graphic novel" Semideuses ". His first short stories book, "7" was released in 2016 and in 2017 returned his comic book career with the graphic novel "I, villain" and the regular comic book "Overdrive", participating in various events, such as CCXP and Comic Con Portugal.