Leng studied as an undergraduate at Balliol College, University of Oxford and as postgraduate student at the University of Toronto.^[1] She worked at the University of Cambridge from 2002 to 2006, and then the University of Liverpool from 2006 to 2011. In 2007, she co-edited a collection called Mathematical Knowledge with Alexander Paseau and Michael Potter, which was published by Oxford University Press,^[2] and, in 2010, she published a monograph called Mathematics and Reality, again with Oxford University Press. In Mathematics and Reality, Leng defends mathematical fictionalism.^[3] Leng joined the University of York in 2012, where she is now a professor.^[1]