MyApp.js

export class MyApp {

  constructor(
    public platform: Platform,
    public statusBar: StatusBar,
    public splashScreen: SplashScreen,
    public backend: BackendProvider
  ) {
    this.initializeApp();

  }

  initializeApp() {
    this.platform.ready().then(() => {
      this.backend.anyMethod().subscribe(() => { // error dependiendo de la plataforma ¿?

      });  
    });
  }
}