Hoeyyn started painting from a young age and has won many art competitions during her period of study. This led her to begin making a living from art when she was only 16 years old.

In 2000, Hoeyyn became a leading lecturer in The One Academy of Communication Design and the secretary of One Art Club at The One Academy, Malaysia. Around the same time, Hoeyyn founded her school - Tong Hua Art School and became an active member of Klang Artist Society, Malaysia. There have been many artistic highlights in Hoeyyn’s life. One such event was taking part in an exhibition for the then Prime Minister of Malaysia Tun Dr.Mahathir Mohamad. Hoeyyn was one of 25 Malaysian artists who were asked to exhibit their best work. With a mixture of pleasure and nerves she painted a wonderful mixed media painting named 'Tun Dr. Mahathir Mohamad, 1988 - Bersatu'.

During the period 2000 to 2005 Hoeyyn was commissioned to produce paintings of several leading movie stars for the premier release of various films in Malaysia, such as Shanghai Knights, Kung Fu Hustle, etc.

In 2005, Hoeyyn wanted to expand her horizons in art and decided to come to London, England. During her stay in London, Hoeyyn presented her work in several art exhibitions. Hoeyyn’s first exhibition in 2005 was at the Soho Art Gallery, London. Following this, in 2006 Hoeyyn was invited to participate in a collective art exhibition at Candid Art Trust, Angel, London.

She then went on in July 2006; with her first London solo art exhibition at Inner Green in upmarket Mayfair. This was followed in 2007 with another solo art exhibition - Impermanence again in Mayfair, London. In this exhibition Hoeyyn was also involved in a charity auction for which she painted 'Madonna' and 'Tiger Cubs'. Proceeds from the auction were donated to the 'Rewilding Project' of Save China's Tigers.

In 2008, Hoeyyn was presented with the Platinum Award, Top 10 Outstanding Artist, Malaysia. Hoeyyn next exhibited in 2010 at the 'London Taste Festival - Taste of Malaysia' in coloration with MATRADE after being invited to represent Malaysian Art. Hoeyyn then presented Face-to-Face solo art exhibition at Woo, Edinburgh, Scotland in 2011.

In 2012 she had her Scotland’s major solo art exhibition – Face Traces at Patriothall Gallery, Edinburgh. 2013 found Hoeyyn invited to represent Malaysian artists at The Malaysian Art Gallery in London in association with MATRADE.

Today, Hoeyyn's work has become widely recognised in London and Malaysia. Hoeyyn now lives and works in Edinburgh. Recently she opened her own gallery – HoeyynArts Gallery on Blackfriars Street in Edinburgh’s prestigious Old Town.