Hundreds of millions of users listen to audio content on Spotify each month, with more than fifty million daily active users listening the content from the homepage alone. On the homepage, we aim to surface the best of Spotify for each user by providing a personalized space where users can find recommendations of playlists, albums, artists, podcasts and more, all tailored to users’ individual preferences. In this talk, we will explain the methods and technologies that are used in the end-to-end process of homepage personalization. In addition, we will present some of the challenges we faced in implementing such solutions in a production environment at scale and the approaches we developed to address them.