Jones’ acting career began in 2010, aged 8 years old, when she appeared as Jasmine in the film One Day. She also portrayed Alice in the Channel 4 drama Utopia, and later that year played the young Queen of Years Merry Gejelh in the British television series Doctor Who episode “The Rings of Akhaten” (2013). The Boston Standard lauded Jones for “carr[ying] off her scenes with aplomb” and for “really sell[ing] Merry’s mixture of naivety, knowledge and childlike fear,” while the website Zap2It praised Jones’ performance for being “spot on.” In film, Jones has had small roles in One Day (2011) and Pirates of the Caribbean: On Stranger Tides (2011).

In 2011, Jones made her theatrical debut after playing the princess Young Fiona in the original cast of Shrek the Musical at the Theatre Royal, Drury Lane. In 2013, Jones appeared in Rebecca Lenkiewicz’s stage adaptation of Henry James’s The Turn of the Screw. She held the role of nine-year-old Flora with two other girls, alternating between them each night. After her performance on press night, Jones commented, “I don’t find it scary, I just find it so much fun… I love every bit of it.”

In December 2018, it was announced that Jones was cast as Kinsey Locke, one of the main characters in the Netflix fantasy drama series Locke & Key (2020-). The first season was released on 7 February 2020. This marked Jones’ first main role in a television series. She was attracted to the role of Kinsey because of the prospect of being able to play two versions of the same character: Kinsey before she removes her fear, and Kinsey after she removes her fear. Jones stated in an interview about Locke & Key, “This, for me, was one of the best shoots I’ve ever done. The cast and crew are incredible and I absolutely adore them.”