We are highly experienced with ETHERUM AND Hyperledger . We also have experience with blockchain API's with node.js MVC Framework. We have built for the bitcoin and the address that we have monitored. Al is done in the node.js Framework and MongoDB database with angular.js. We have implemented Google login, facebook login, twitter login, LinkedIn we also done the Stripe and pay pal payment integration in that project too for Stripe we are familiar with taking credit card details tokenizing it, block payment through token and refunding.