Sonam Sethi is a .NET Developer with 3.9 years of experience working as a Senior System Engineer at Infosys. She has skills in C#, ASP.NET, SQL Server and has experience developing web applications and automation tools. The document provides details of 4 projects Sethi worked on at Infosys involving developing applications for RFP automation, a CIS dashboard, an inventory gathering tool, and an online evaluation portal.