Roku App for VOD platform

Hi, i wand to add a new payment gateway to restrict content pro Here you can find the api of restrictcontentpro [login to view URL] and here the api of greenpay [login to view URL] I need all the functions, recuerente charge, to be able to deactivate a recurente charge from the website etc.I have a fully operational website working on Wordpress, I used themoviedb api to get the data of each content and other functions and use videojs as a player I use HLS and Dash. I think we could use the wordpress rest api to manage the content of the application for Roku and Fire stick. I will start with only one, which the developer recommends for me is indifferent to start with either. I'm interested in a developer who knows how to create applications for smart TVs to continue working only with a developer.