He was known as one of the members and lead vocalist of the popular musical trio APO Hiking Society along with Boboy Garrovillo and Jim Paredes, wherein he was the oldest of the group.

[3][4] Javier’s compositions include "Show Me A Smile" (1976), "Pag-ibig" (1978), "Lumang Tugtugin" (1978), "Pumapatak ang Ulan" (1978), "Kaibigan" (1978), "Doo Bidoo" (1978), "Kabilugan ng Buwan" (1980), "Princesa" (1980), "Blue Jeans" (1981), "Salawikain" (1982), "Kumot At Unan" (1983), "Di Na Natuto" (1985), "Awit ng Barkada" (1991), "Just A Smile Away" (1992),[5] "Isang Dangkal" (1999), and his last composition, "Lahat Tayo" (2022).

As a television actor, Javier was part of different shows and movies such as Kung Mangarap Ka't Magising (1977), Kakabakaba Ka Ba?

Two hugely successful tribute albums were produced in 2006 and 2007 by its management group, featuring numerous young bands reinterpreting APO's expansive repertoire,[11] included many hit songs such as "When I Met You", "Panalangin", "Batang-Bata Ka Pa", "Yakap Sa Dilim", "Pumapatak Ang Ulan", "Ewan", "Handong Ng Pilipino Sa Mundo", "Awit Ng Barkada", "Mahirap Magmahal Ng Syota Ng Iba", "Paano", "Pag-ibig", "Nakapagtataka", "Di Na Natuto", "Show Me A Smile", "Blue Jeans", "Tuyo Na'ng Damdamin", "Kumot At Unan", "Kaibigan", "Sa'n Na Nga Ba'ng Barkada Ngayon", "Bawat Bata", "Princesa", "American Junk", "Lumang Tugtugin", "Salawikain", "Doo Bidoo", and many among others.

[12] In 2010, the APO Hiking Society, composed of Javier, Paredes, and Garrovillo decided to retire as a group after 41 years of activity.

Javier's siblings ex housemate from Pinoy Big Brother: Teen Edition 4 Nikka, Jobim, worked as a radio DJ at Jam 88.3 and as a stage theatre actor who was part of Eto Na!

[4] Javier died of complications due to a prolonged illness at the National Kidney and Transplant Institute on October 31, 2022, at the age of 75, as confirmed by his daughter Justine.