Born in Hong Kong and raised in Philadelphia, Jannie studied at Parsons The New School of Design in New York, earning a BFA in illustration. After working as a graphic designer and an art director at many fun places such as Nickelodeon, Scholastic, and TIME Magazine for Kids, she decided that illustration was her true calling.

Jannie now specializes in illustrating for the children's market, with her work appearing in both trade and educational books, magazines, toys, crafts and digital media. 

Target, HarperCollins, Little Brown & Co., Viking, Sterling, Scholastic, Toys R Us, Penguin, Oxford University Press, Cartwheel Books, Peaceable Kingdom Press, Highlights for Children, HighFive Magazine, Walter Foster Publishing, Colorbok, and many more.