- Software Development: Java, C#, Kotlin, Go, Rust, C, C++, Ruby
- Graphics Programming: OpenGL, Vulkan, Love2D, GLSL
- Network Programming: Elixir, Netty, OpenSSL
- Backend Development: VertX, Rocket, Ruby on Rails, Iris
- Build Automation: Jenkins, Gradle, Maven, Github Actions
- Game Engines: Godot, Unity, GameMaker Studio, XNA, LWJGL, GLFW, SDL2
- Database Administration: MySQL, PostgreSQL, Redis, MongoDB, Cassandra, SQLite
- Further Elixir/Erlang
- Lenses / Point Free Programming
- Haskell
(see below!)