Feldmann's first band was Saratoga-based Family Crisis. Feldmann formed Goldfinger in Los Angeles in 1994 In 1999, Goldfinger's song "Superman" was featured in the ''
Tony Hawk's Pro Skater'' video game. He produced
Story of the Year's 2003 debut album
Page Avenue, which was certified Gold by the RIAA and peaked at number 51 on the
Billboard 200, and included the hits "
Anthem of Our Dying Day" and "
Until the Day I Die". He produced and co-wrote
Blink-182's 2016 album
California, which reached number 1 on the Billboard 200 and was nominated for a
Grammy Award for Best Rock Album. He co-wrote and co-produced "
Made An America" by
The Fever 333, which was nominated for a
Grammy Award for Best Rock Performance. He has also co-written and produced for
All Time Low,
5 Seconds of Summer,
Good Charlotte,
Panic! at the Disco,
Beartooth,
Biffy Clyro,
Korn,
311,
Black Veil Brides,
Avril Lavigne,
Ashlee Simpson,
Ashley Tisdale,
Hilary Duff,
Mandy Moore, and
Papa Roach. Feldmann is a former A&R consultant for
Red Bull Records. In 2016, he became the Vice President of A&R at
BMG. He currently works with artists to produce albums released under the record label Big Noise, which he founded alongside
Nick Gross and Jon Cohen in 2017. Feldmann,
Travis Barker, and John Reese started Back to the Beach Festival at Huntington State Beach in 2018. The two-day ska and punk festival featured
The Mighty Mighty Bosstones,
311, and
Sublime With Rome its first year, and was headlined by Blink-182 in 2019, but has not returned after that. Feldmann is published by Big Noise and managed by Lucas Keller and Nic Warner at Milk & Honey. == Personal life ==