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