I've worked with kinds of technologies and one of my favorite things is to study new ones and understand how can I use it to solve a problem. For me software development is a way of living, we can build amazing stuffs with well tested and properly designed applications, that's why I really love what I do.
Open source technologies are my kind of thing: most of my work has been creating PHP libraries that can help other developers. I did a lot of work with a lot of Javascript (Node.js), have worked with the .NET plataform and, for some tasks, Python and Ruby.
By the way I like to dive into DevOps too, create a good deployment pipeline (concourse CI ftw), run Docker with Kubernetes, settin...