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I will fix debug and optimize your asp net core web API
Ahsan Fayyaz
About this gig
Are you facing errors, bugs, authentication problems, database issues, or slow performance in your ASP.NET Core Web API?
I will professionally debug, fix, and optimize your ASP.NET Core / .NET Web API application.
I can help with:
ASP.NET Core Web API bugs
C# errors and exceptions
REST API issues
Entity Framework Core problems
SQL Server database errors
JWT authentication & authorization
Role and claims issues
Controller and routing problems
CRUD API issues
Dependency Injection errors
Model validation problems
EF Core migrations
Database relationship issues
Swagger configuration
HTTP status code problems
API response issues
Performance and query optimization
.NET configuration problems
Technologies
C# | ASP.NET Core | .NET | Web API | Entity Framework Core | SQL Server | JWT | REST API | Swagger
Why choose me?
Clean and maintainable code
Proper debugging and troubleshooting
Secure API practices
Clear communication
Tested solutions
Professional backend development
I can work with both new and existing ASP.NET Core projects.
Please contact me before placing an order and send me your error, requirement, or project details so I can confirm the scope and recommend the right package.
Get to know Ahsan Fayyaz
Ahsan Fayyaz
DotNet Developer
- FromPakistan
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Urdu, English, French
Hi, I'm Ahsan, a .NET Full Stack Developer specializing in ASP.NET Core, C#, SQL Server, Entity Framework Core, Web API, and React. I build responsive, secure, and scalable web applications with clean, maintainable code. I focus on delivering high-quality work, clear communication, and on-time project completion. Let's work together to turn your ideas into reliable web solutions.
My Portfolio
Other Software Development Services I Offer
FAQ
Q: Can you fix an existing ASP.NET Core project?
Yes. I can debug and fix existing ASP.NET Core Web API and C# projects.
Q: Can you fix Entity Framework Core errors?
Yes. I can troubleshoot EF Core relationships, migrations, DbContext, queries and database-related errors.
Q: Can you fix SQL Server problems?
Yes. I can troubleshoot SQL Server connection, query, database and EF Core integration issues.
Q: Can you fix JWT authentication?
Yes. I can troubleshoot JWT login, authorization, roles, claims and protected API endpoints
Q: Can you optimize a slow API?
Yes. I can investigate inefficient queries, API logic and common backend performance problems.
Q: Do you work with Swagger?
Yes. I can troubleshoot Swagger/OpenAPI configuration and API endpoint issues.
Q: Can you work on my existing source code?
Yes. You can provide the relevant project files/code and explain the issue you are facing.
Q: Should I contact you before ordering?
Yes. Please contact me first with your issue and project details so I can confirm the scope.
