A .NET web developer programs and builds web applications for business systems using languages and technology from the .NET framework. As a .NET web developer, your duties include designing web-based applications, documenting application codes, and assessing and upgrading existing applications. You may also provide technical support. To become a .NET web developer, you typically need an understanding of .NET framework and technology, relevant programming experience, and a strong portfolio of work. Although technical ability may be considered more important than formal education for this career, some employers prefer candidates to also have a four-year degree in a computer-related field.