An ASP.NET ./. developer designs, implements, and maintains web applications using ASP.NET framework versions . and .. They write server-side code using C# or VB.NET, create database schemas, and ensure seamless data flow between the server and user interface. They develop web services for data consumption and integrate these services into client-side functionality. They also handle security measures, including form-based authentication and role-based authorization. Debugging, testing, and improving application performance are also part of their responsibilities. They collaborate with other team members and participate in all stages of the software development life cycle.