https://tech.jet.com/blog/2015/03-22-on-how-jet-chose/ https://tech.jet.com/blog/2015/03-22-on-how-jet-chose/ The app for associate delivery was written by Jet

https://tech.jet.com/blog/2015/03-22-on-how-jet-chose/ https://tech.jet.com/blog/2015/03-22-on-how-jet-chose/ The app for associate delivery was written by Jet developers. Pretty much all of Jet's code is written in F#. Edit: Actually I think it was written mostly by a contractor who had experience writing Xamarin apps in F#, possibly with contributions from full-time Jet developers.