Coming from a family of singers, De Castro joined multiple local singing contests.[2] This includes the Hiyas ng Sining in 2005 where he became the grand champion.[3]
He would eventually be able to join the Manila Philharmonic Orchestra as a wedding singer in 2016.[2]
This would lead him to join the inaugural season of the Tawag ng Tanghalan (TNT) song competition segment of the variety show It's Showtime of ABS-CBN in 2017. He failed to place but returned in the TNT All-Star Grand Resbak in 2019 to finish as runner-up.[4] He lost to Mark Michael Garcia in the final. De Castro performed "Listen" by Beyoncé and a medley of songs by Sarah Geronimo.[5]
He would take part in various different theater productions such as Lion King: The Musical in 2014. He was selected to record the gospel song "Sa Piling Ko" which was used as a theme song in the television special, In My Father's Arms.[3]
De Castro would secure a recording contract with Viva Records. In 2022, he joined season two of Masked Singer Pilipinas of TV5. In the competition where contestant's concealed their identities in costumes, De Castro dressed in a banana costume. He finished as a semi-finalist.[6]
De Castro would join the 2023 Stars of the Albion Grand Prix in London upon the recommendation of Vega Entertainment Productions.[7] He was able to join after a successful fundraiser.[1] He would bagged the title, becoming the fifth Filipino to do so after Rachel Gabreza (2018), Marlon Macabaya (2019), Reign Macalinao (2020), and Danielle Soliman (2021).[8] His feat was recognized by Philippine President Bongbong Marcos.[9]
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