[8] Dimaranan also performed a duet with Brian McFadden, member of Irish boy band Westlife during his concert in the Philippines.
Her first television appearance was in 2012, via GMA Network's Biritera, which she thought it was a singing contest, turned out to be a musical drama series and ended up getting a role.
On July 28, 2019, she was hailed as the first grand winner of Idol Philippines after garnering 100 percent of the votes, earning a ₱2,000,000 cash prize, along with an all-expense trip to Taiwan, a house and lot from Camella Homes, and a contract with Star Music.
[17] In August 2019, Zephanie was launched as a new regular performer of ASAP Natin 'To and eventually became part of an all-female vocal group named "J.E.Z", together with Janine Berdin and Elha Nympha.
[23] Few days after, Zephanie held her first major solo concert on November 28, 2019, at the New Frontier Theater, with Sarah Geronimo, Elha Nympha, Idol Philippines Top 4 – Lance, Lucas, Dan and Miguel, Erik Santos and Regine Velasquez (Moira Dela Torre and Janine Berdin were originally supposed to be part of the concert's special guests, but pulled out due to health issues.
In October 2020, after not appearing on ASAP for 7 months, amidst the shutdown and franchise crisis of ABS-CBN during the COVID-19 pandemic, Zephanie became a part of "Sunday Noontime Live!
She was part of the segment entitled "Ultimate Vocal Showdown" with Fatima Louise Lagueras a.k.a Fana, Sassa Dagdag, Sam Mangubat and Niel Murillo of BoybandPH.
[31][failed verification] The show only lasted for three months before it was cancelled on January 17, 2021, being replaced by a simulcast of ASAP Natin 'To on the said network's noontime timeslot.
[32] She was launched as one of the 12 interpreters of Himig Handog 11th Edition with a song entitled "Tinadhana Sa'Yo", composed by SJ Gandia from the United States.
In February 2021, Zephanie returned to ABS-CBN following a 3-month stint under Brightlight Productions by appearing on It's Showtime's Hide N' Sing segment.
[36] On March 7, 2021, Zephanie made her comeback to the ASAP stage after one year of not appearing on the said show, performing her Himig 11th Edition entry "Tinadhana Sa'yo".
[39] In 2021, she interpreted a cover of Yeng Constantino's song titled "Lapit" as the themesong for the TV series Niña Niño, produced by Spring Films and Cornerstone Studios.
[51] In the first week of the year 2022, Zephanie finally released her self-titled debut album, which showcases her previously released singles and original songs with a carrier single “Magpakita Ka Na" composed by Miguel Mendoza III, the composer of the hit song Isa Pang Araw which she also has a rendition included on her album.
[53] After two and a half years in ABS-CBN, Zephanie returned to her home network, GMA on March 31, 2022,[13] as she signed a contract with their talent agency Sparkle,[54] while remaining co-managed by Cornerstone Entertainment.
She continued to sing various Official Soundtrack from GMA Drama series such as Can This Be Love for Luv Is: Caught in his Arms, Walang Ibang Dahilan for Arabella and Kung Ang Puso for Lovers & Liars.
In Disney's 100th anniversary, she is tapped to record the Filipino rendition of Ariana DeBose's song "This Wish", translated as "Aking Hiling".
In same month, she came back as an actress in Daig Kayo ng Lola Ko "Mga Hero ni Jiro" as a brave girl scout with three episodes.
In July 2024, she was revealed as part of the upcoming GMA action-drama series, "Mga Batang Riles" together with Miguel Tanfelix, Raheel Bhyria, Bruce Roeland, Antonio Vinzon and Kokoy De Santos.
In August 2024, she was introduced as one of the lead stars of GMA Public Affairs's youth oriented series entitled "MAKA" along with Ashley Sarmiento & Marco Masa, to be aired on September.