AWS, API Gateway, Lambda, RDS, .Net Core, Web API, Angular 9, AngularJS, SignalR, MVC, C#, ASP.Net, VB.Net, ADO.Net, LINQ, OOPS, Design Patterns, Web Services, WCF, Python, AJAX, Jquery/JSon, Javascript, CSS, HTML, XML, SQL, MySql, Telerik Rad Controls, nUnit, Appsflier, Payment Gateways – Stripe, Braintree, Paypal, iOS-Android In-App Purchases, etc.