Senior Full Stack .NET Developer with 21= years of experience designing, building, and maintaining enterprise ERP and web systems across Egypt, Qatar, and Saudi Arabia. Deep expertise in C, ASP.NET Core, Entity Framework Core, and Angular, with a 12-year track record as sole architect and developer of a full ERP platform for a multinational publishing group. Strong background in relational database design (SQL Server, PostgreSQL, MySQL, Oracle), RESTful API development, and system integrations including ZATCA tax compliance. Seeking a Senior Full Stack Developer or Lead Software Engineer role, open to Cairo-based or remote opportunities