Yeri was introduced as a new member of Red Velvet on March 10, 2015, during the promotions of their first extended play (EP) Ice Cream Cake.

[10] In July 2016, Yeri played the female lead in the music video for J-Min and Shim Eun-jee's single "Way Back Home", which was released as part of the project SM Station.

[12] In December 2017, singer Ragoon released his EP Talking, whose lead single "Story" was co-written by Yeri.

[13] In April 2018, Yeri was confirmed as part of the cast of JTBC's new variety show Secret Unnie together with Han Chae-young.

[15] They released the official Korean soundtrack version of "Hair in the Air" from the television series Trolls: The Beat Goes On!.

[15] On March 14, 2019, the music video for Yeri's first self-composed solo project "Dear Diary" was released as a part of SM Station Season 3.

The same month, Yeri was confirmed as part of the cast of Law of the Jungle in Thailand [17] In May, she featured in South Korean rapper Giant Pink's song "Tuesday is better than Monday".

[24] Aside from endorsements with Red Velvet, in January 2020, Yeri released her own lipstick collection with make-up brand Notre Colette.