Introduction to Evotrees.jl, a package developed to provide a pure Julia implementation of Gradient Boosted Trees with performance competitive with reference C++ implementations. Main design choices and challenges encountered to achieve a performant solution will be covered. Discussion of the benefits stemming from developing in Julia, notably the ease to extend supported models such as quantile and Gaussian regression, as well as its MLJ ecosystem integration. Time Stamps: 00:00 Welcome! 00:10 Help us add time stamps or captions to this video! See the description for details. Want to help add timestamps to our YouTube videos to help with discoverability? Find out more here: https://github.com/JuliaCommunity/YouTubeVideoTimestamps Interested in improving the auto generated captions? Get involved here: https://github.com/JuliaCommunity/YouTubeVideoSubtitles