Early planning (backlog development, etc.) iOS native app development (Swift, Objective-C) Android native app development (Java, Kotlin) Web back-end development (Ruby on Rails, MySQL/PostgreSQL, C#, .Net Core MVC, ASP.NET) Web front-end development (HTML5, CSS3, JavaScript, Jade, Stylus, Node.js, AngularJS, ReactJS, .Net Core MVC, ASP.NET, WordPress, CMS) Project management Quality assurance and testing Release