AR/MR Programmer familiar with Unity, Vuforia & ARKit

We have an ongoing Mixed Reality project that currently has a iOS and Android app currently developed in Unity (may not the best platform and we would be willing to change that) that leverages the features of Vuforia but we would like to switch to ARKit at some point. If all of this makes sense to you, and you have and experience and understanding of Augmented Reality / Mixed Reality then we want to hear from you.