She began acting while studying at Ege University's Faculty of Business Administration. She placed in the top 5 in a beauty contest and became a model. Between 2009 and 2010, she studied acting at the Müjdat Gezen Art Center in Istanbul. She also received acting training from the Contemporary Drama Group and Ali Haydar Elçığ. Altınbilek, who began her acting career in 2011 with the TV series Derin Sular, co-starred with Şükrü Özyıldız. She portrayed the character Özlem in the TV series Karagül, which began airing in 2013, and shared the lead roles with Ece Uslu, Şerif Sezer, and Mesut Akusta. Hilal Altınbilek became one of the well-known actors with this series. In 2016, she played the role of Nil in the TV series Hayatımın Aşkı. In 2018, she starred in the drama-thriller movie Çocuklar Sana Emanet (Children Are Entrusted to You), directed and written by Çağan Irmak, alongside Engin Akyürek. Since the same year, she has been portraying the character of Züleyha in the television series Once Upon a Time in Çukurova, produced by Tims Productions.