As a
trainee at
Starship Entertainment in early 2018, Jang was chosen as a model in a music video sponsored by
Pepsi Korea called "Love It Live It", along with YDPP and Park Sun. She also appeared in
GQ Korea's July 2020 issue, and listed among the K-icons for Miu Miu during the Autumn/Winter 2021 Fashion Week. In 2021, Jang was one of the Iz*One members chosen to model in the music video "Zero:Attitude" for the Pepsi 2021 K-Pop Campaign. The campaign was revealed Starship Entertainment as a collaboration between Iz*One and
Soyou, featuring rapper
pH-1. After Iz*One's disbandment, Jang appeared in several fashion films, namely for
Chaumet's
Joséphine Collection and Miu Miu's Maritime. On July 27, 2021,
Amorepacific Corporation announced that Jang was chosen as global ambassador for its natural cosmetics brand
Innisfree. In October 2021, Jang was officially announced as Kirsh's new muse. She represented the brand for its 2021 Winter and 2022 Spring/Summer collections. In the ''Harper's Bazaar Korea'' December 2021 issue, for which she was the cover girl, Jang was officially announced as Miu Miu's brand ambassador. Following the announcement, she appeared in
Y Magazine's April 2022 issue to represent the Miu Miu Spring 2022 ready-to-wear collection and
Bvlgari's Divas' Dream collection. Following her debut as a member of Ive, Jang continued to expand her influence by endorsing a variety of fashion and lifestyle brands. On May 20, 2022, she was officially announced as the latest model for
SK Telecom. In June 2022, she, alongside group member
Leeseo, was selected as a model for the Pepsi 2022 K-Pop Campaign. This initiative, unveiled by Starship Entertainment, featured a collaboration between Ive,
Cravity, and
Oh My Girl for the promotional music video "Blue & Black." On July 18, 2022, Jang was appointed ambassador for the golfwear brand Gospheres, representing the label in a pictorial featured in the August 2022 issue of
Elle Korea. Just days later, on July 21, she was named global ambassador and muse for the color
contact lens brand Hapa Kristin. On August 16, 2022, she became a model for the French outdoor fashion brand
Eider, and three days afterward, she was announced as the first Korean ambassador for the French jewelry house
Fred Joaillier. Jang has since represented the brand in numerous publications, including
Marie Claire Korea,
W Korea, and
Cosmopolitan. '''s April 2024 issue In recognition of her rising influence,
Maeil Business Newspaper described Jang in 2022 as "a
blue chip in the advertising world." In September of the same year, she was named muse for Suecomma Bonnie, a South Korean footwear brand under
Kolon Industries, modeling for its 2022 Fall/Winter collection titled "Young and Rich" as well as the brand's 20th anniversary collaboration with
Barbie. In February 2023, Jang was named the muse for South Korean casual fashion label SJSJ. Later that year, in August, she began representing the beauty brand Amuse as its new model. The following February, it was revealed that Jang is the new model for the clothing brand Rolarola. She was also introduced as a brand ambassador for the French haircare company
Kérastase in April of the same year. Subsequently, on August 30, she was unveiled as the global brand ambassador for
Tommy Jeans. On February 14, 2025, Jang was introduced as the new promotional model of
Woori Bank. Woori Bank also announced the release of its new mobile service
Woori WON mobile and its stock trading application "Woori WON MTS" with Jang as the appointed campaign model. The following month, she was announced as the brand ambassador for the Vietnamese beverage company Malto. On April 7, she was revealed as the advertising model for
Binggrae's ice cream line, Deep & Low, and shortly thereafter, she was named ambassador for
Dyson Korea. In May, she began representing the global nail care brand Dashing Diva. Most recently, she was introduced as the model for
Downy Korea on July 1, and was subsequently announced as the new model of Medicube's beauty device AGE-R on July 8. In August, Italian luxury house
Bulgari announced Jang as its ambassador. In December, Jang appeared alongside
Byeon Woo-seok and
Karina for
Google Gemini's advertising campaign titled "The Christmas Song". In March 2026, Jang became the global model of skincare brand Dr. Althea. In April 2026, Jang was announced as
Asia Pacific ambassador of Dyson alongside actor
Park Bo-gum. ==Discography==