Abdelrahman mohamed

I'm a Backend Developer working with C#/.NET and SQL Server on enterprise systems, and I take on freelance projects for clients who need reliable, maintainable backends.

What I can build for you:
• REST APIs with ASP.NET Core (clean architecture, validation, proper error handling)
• SQL Server database design, complex queries, and performance tuning
• Data access with Dapper and EF Core
• Business logic that protects data integrity (e.g., preventing booking/schedule overlaps and conflicting records)
• Data and file conversion between formats (Excel, CSV, JSON, XML, and more)
• Bug fixing, refactoring, and extending existing .NET projects

How I work:
• I ask the right questions up front so the scope is clear before I start
• I explain technical decisions in plain language, not just deliver code
• I write defensive code (guard clauses, custom exceptions) so the system stays stable
• I deliver on time and keep you updated along the way

Tools: Visual Studio, SSMS, Git, Azure DevOps, Postman.