react native payment processing payment gateways softwaretesting api testing api test automation crm realestate crmdevelopment choosecrm cutis itcompany canada agile business development it quality assurance automated testing devops itoutsourcing web application development cost stripe paypal braintree usability testing software development mobile app e-commerce agile approach joomla wordpress saas cloud services single page applications spa e-learning web development testing tools mocha javascript testing ionic phonegap cordova webrtc ebook mobile app development react native