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I will fix asp dot net core, web API, ef core and sql server bugs
Sakib Hossain
About this gig
Are you facing bugs or unexpected issues in your ASP.NET Core application or Web API?
I can help you identify the root cause and provide a clean, reliable solution without making unnecessary changes to your existing codebase.
**I can help you with:**
- ASP.NET Core & C# bug fixing
- REST API errors and integration issues
- Entity Framework Core & LINQ issues
- SQL Server queries and stored procedures
- JWT authentication & authorization
- Dependency Injection & configuration
- Database mapping and relationships
- Business logic & validation issues
- Performance and query optimization
- Existing .NET project troubleshooting
**Why work with me?**
- Clean and maintainable code
- Proper debugging and root-cause analysis
- Clear and friendly communication
- Respect for your existing project structure
- Reliable and professional support
I work with ASP.NET Core, C#, Web API, EF Core, LINQ, SQL Server, JWT, and modern backend development.
Have a specific error or not sure which package to choose?
**Send me a message with your error, screenshot, or a short description of the issue. Ill review it and help you choose the right solution.**
For complex issues, please contact me before placing an order.
Get to know Sakib Hossain
Sakib Hossain
Full Stack Web Developer ASP DOT NET Core And Angular
- FromBangladesh
- Member sinceJul 2017
- Avg. response time1 hour
Languages
Bengali, English
Hey, I'm Sakib — a full stack developer working with ASP.NET Core, C#, Angular, and SQL Server for 3+ years now.
I've mostly worked on real business systems — ERP, POS, inventory, and e-commerce platforms — so I've dealt with messy legacy code, slow queries, and clients who needed fixes fast.
I handle APIs, EF Core/LINQ, database design, auth, and performance issues. I ask questions when something's unclear and keep you updated instead of disappearing.
Got a bug or a project? Message me, let's talk it through.
Other Software Development Services I Offer
FAQ
What information do you need to start?
Please send me a short description of the issue, the error message or screenshot, and the relevant code or project files. If possible, also mention your .NET version and what you expect the application to do.
Can you work on an existing ASP.NET Core project?
Yes. I can investigate and fix issues in existing ASP.NET Core applications while respecting the current project structure and coding approach.
Can you fix Entity Framework Core and LINQ issues?
Yes. I can help with EF Core queries, LINQ errors, relationships, mappings, migrations, database operations, and query performance issues.
Do you work with SQL Server?
Yes. I can troubleshoot SQL queries, stored procedures, database-related errors, data access issues, and performance problems related to your .NET application.
Can you fix JWT authentication and authorization issues?
Yes. I can troubleshoot JWT tokens, authentication, authorization, roles, claims, protected endpoints, and related configuration issues.
Can you integrate or fix third-party APIs?
Yes. I can help troubleshoot REST API integrations, request and response handling, authentication, data mapping, and integration-related errors.
Can you improve slow API or database performance?
Yes. I can investigate common performance problems in API logic, EF Core/LINQ queries, and SQL Server. Please contact me first for performance-related work because the scope can vary.
Should I contact you before placing an order?
For a small and clearly defined issue, you can place an order directly. For complex issues or if you are unsure about the package, please message me first so I can review the scope.
