He was born in Maringá in Paraná, and moved to Japan in 1994 at the age of sixteen. He enrolled in Meitoku Gijuku High School in Kōchi and played football for the school club. After graduating from the school, he joined the J. League Division 1 team Shimizu S-Pulse in 1997. In 1999, he received the J. League Player of the Year.
Since Zico took over as the national team manager, Alex was a constant on the left side of the Japanese lineup, as a fullback in 4-4-2 formation or midfielder in 3-5-2 formation, and was selected to Japan's 2006 World Cup squad in May 2006, providing an assistance for Keiji Tamada in a group stage match against his former country Brazil.
In January 2007, Alex was loaned out to Red Bull Salzburg. He went back to Urawa in January 2008. He received a serious injury in a test match and had only one appearance in this season. In July 2009, he agreed to move to Nagoya Grampus. He made 55 appearances for the club, before joining J. League Division 2 side Tochigi SC for the 2013 season. He made 25 appearances there, scoring twice. In January 2014, he joined fellow J. League Division 2 team F.C. Gifu.