An ASP.NET developer is someone whose job it is to create software applications using Microsoft technologies.
While the name "ASP.NET developer" is new, the use of Microsoft technologies to create applications is far from new.
Since the introduction of the Windows 3.1 operating system, Microsoft has been using common programming interfaces (APIs) such as COM (Component Object Model) and ActiveX.
Why ASP? In 2002, Microsoft introduced ASP.
NET, a web development framework. ASP.NET was designed specifically for building dynamic web sites and web applications.