Julia is a programming language that is simple to write and scriptable like Python and R, but fast like C or C++. At 10 years, it’s a young language, so the ecosystem isn’t as large and mature as you want it to be. Maarten Pronk was an early adopter of the language in his research at Deltares, a Dutch research institute. In this lecture(s) he introduced Julia, his motivation to use it and his OSS journey. Half of the lecture was non-spatial, while the latter half focused on the JuliaGeo ecosystem and showcased some of the possibilities of the Julia language.