Wai-Yin Lee was born in Hong Kong, and obtained her Degree in Piano from the Hong Kong Academy for Performing Arts (HKAPA). In 2000, she was awarded a two-year full scholarship from the Royal College of Music in London to study Piano Performance. After completing her Masters Degree at the Guildhall School of Music and Drama, she then pursued her studies as a repetiteur on City Educational Scholarship. The following year, she was awarded a fellowship at the GSMD. The same year she was also invited to join National Opera Studio as a part-time repetiteur trainee.
Wai-Yin is currently working at the Royal College of Music as a repetiteur and as a coach for the Opera School, also as one of the official accompanists for the entrance exams.
She has also worked for the Opera Holland Park, Grange Park Opera Company, English Touring Opera, Co-opera, Birmingham Opera Company, Longborough Festival Opera, European Opera Centre, Castleward Opera Company, English Pocket Opera, Pegasus Opera Company, Southgate Opera, British Youth Opera, European Chamber Opera and the National Opera Studio.