Hajas has worked with several bands/artists from all five continents in different musical styles in his more than 20 years of experience, with more than 30 works released worldwide, including a remix album released in 2005 in New York, USA entirely produced, arranged and programmed by him. As a Remixer, he won 9 of the 10 Remix competitions he participated in, and was nominated and came in second place in the Remixer of the Year 2003 Awards promoted by the American magazine Electro Culture Magazine in 2004. As a result, he participated in the judging panel of some Remix competitions in the following years and also taught a remix course at one of the most renowned music production schools in Rio.