This is a Minecraft server being made from scratch by a developer who is building everything before it goes public.
The big idea is that it is not just one game mode. The community gets to decide what gets added and people can suggest ideas through a custom suggestions system. If the community votes for something then it gets added.
Right now they are recruiting builders to help shape the world and give it personality. Builders get lots of creative freedom and access to a huge custom head collection.
They also want staff who like to brainstorm features and help wherever they can. There are also management and support roles for people who can keep the team organized and positive. If you join early you get a real say in what the server becomes.
