A Microsoft Technology Associate (MTA) developer is a certified professional who has demonstrated fundamental knowledge in software development using Microsoft technologies. They design, code, test, and maintain applications, often specializing in web or mobile development. Their work involves understanding core programming concepts, object-oriented programming, general software development, databases, .NET framework, , , and JavaScript. They are also familiar with Microsoft Visual Studio and can effectively use it for application development. Their certification ensures they are proficient in these areas, making them valuable assets in any software development team.