Madeleine's music is rooted in the traditional music of New England. She moved to Glasgow from New Hampshire in 2014 to study at the Royal Conservatoire of Scotland and earned a BMus (Hons) in Traditional Music.

In 2023, she was a finalist in the BBC Young Traditional Musician of the Year competition, and her trio was nominated for Up and Coming Musician of the Year at the MG Alba Scottish Music Awards. She has played at festivals including Celtic Connections and Celtic Colours, and has toured in the UK, the US and Europe. 

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​She currently plays with the Routes Quartet, folk-fusion band Eriska, fiddle-cello duo the Peanut Gallery, and with Rory Matheson and Craig Baxter in the Madeleine Stewart Trio. Routes is a string quartet that plays traditional music and original compositions; in contrast, Eriska explores the wide ranges of influences and musical tendencies of each of its individual members. The Peanut Gallery is a blend of Scottish and American styles, while the trio is grounded by Madeleine’s own tunes and style.

Madeleine also teaches for The Folks’ Music Project, a CIC providing community music workshops and events in the Glasgow area.