[2] The young Javier learned the rudiments of the game of basketball when he participated in a camp held by former PBA player Ed Cordero sometime in 2005.
A year later, he was recruited by the San Beda Red Cubs, which he helped win more championships in the high school division of the National Collegiate Athletic Association.
[4] Javier played his entire five-year collegiate career for the UE Red Warriors in the University Athletic Association of the Philippines.
On September 10, 2017, Javier, along with Allein Maliksi, was traded to the Blackwater Elite for Kyle Pascual and Riego Gamalinda.
[10] As of the end of 2022–23 season[11] [12] Javier suited up for the Philippine national team that competed in the 2016 FIBA Asia Challenge in Tehran.