It's Angular 1.4 at the moment - the project was started well before A2 had anything like a coherent direction for its API. Releasing an Angular 2-compatible version is one of our top priorities for the next surge of development.

That said, Xing uses Hannah Howard's module A1Atscript (https://github.com/hannahhoward/a1atscript) to add a very Angular 2-like TypeScript annotation syntax, including A2-like component architecture.

That should make Xing apps much easier to translate to Angular 2 than other Angular 1.X apps.