To thrive as a Senior .NET Developer with Visa Sponsorship, you need advanced proficiency in C#, ASP.NET, and related frameworks, along with a bachelor’s degree in computer science or a similar field and several years of hands-on development experience. Familiarity with tools like Visual Studio, SQL Server, Azure DevOps, and certifications such as Microsoft Certified: Azure Developer Associate are highly beneficial. Strong problem-solving, teamwork, and communication skills are essential for collaborating effectively with cross-functional and global teams. These competencies ensure high-quality software delivery, support complex project requirements, and facilitate integration within international work environments.