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Fiverr Pro
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$
USD
I will debug and fix asp net core web API bugs
Charaf Eddine M
About this gig
A failing ASP.NET Core API can waste hours in logs, configuration, and failed fixes. I will trace the cause, repair it cleanly, and verify the fix in your .NET codebase.
I can help with:
- API errors, exceptions, and incorrect responses
- EF Core queries, migrations, and database issues
- JWT, OpenID Connect, roles, and authorization
- Dependency injection and configuration problems
- External API and service integrations
- Validation, performance, and Docker backend issues
I bring professional .NET experience from enterprise and government-scale applications, along with building a multi-service digital-trust platform. I work with ASP.NET Core, C#, EF Core, SQL Server, authentication, integrations, and Docker.
My process is focused: reproduce the issue, find the root cause, make the smallest reliable change, and test the agreed fix. Package-dependent documentation explains what caused the problem and what changed.
Each package covers the issue described in your requirements. New features, unrelated defects, major rewrites, or deployment work may require an extra or custom offer.
Not sure which package fits? Send the error and expected behavior, and I will help you choose.
Get to know Charaf Eddine M
Charaf Eddine M
Full Stack Software Engineer
- FromMorocco
- Member sinceSep 2019
Languages
English, Arabic, French
I'm a software engineer and startup co-founder focused on building reliable SaaS products and solving complex application problems. I work across backend and full-stack development, APIs, databases, authentication, integrations, multi-tenant systems, and modern web apps.
I can help you build an MVP or AI-powered SaaS, develop or improve backend systems, integrate services, or diagnose and fix difficult bugs in existing applications.
I value clean architecture, security, maintainable code, clear scope, and software that works reliably in real-world use.
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FAQ
What ASP.NET Core problems can you fix?
I fix ASP.NET Core Web API errors, exceptions, incorrect responses, EF Core and database issues, dependency injection failures, authentication and authorization problems, external API integrations, validation errors, and backend configuration defects.
Which package should I choose?
Choose Basic for one small, reproducible issue. Standard covers up to two related backend issues and includes a change summary. Premium is for a complex defect involving authentication, data, integrations, performance, or several application layers.
What do you need to begin debugging?
Please provide the source code or repository, .NET version, expected and actual behavior, reproduction steps, error messages or logs, and local setup instructions. If credentials are required, provide safe test credentials only, never production secrets or real user data.
Can I order directly without contacting you first?
Yes, if your issue clearly fits a package and you can provide the required technical details. If the cause is unclear, several systems are affected, or the application does not build, send me the error and context first and I will help you select the right scope.
Can you fix JWT, authentication, and authorization issues?
Yes. I can investigate JWT validation, OpenID Connect, login flows, roles, permissions, policies, claims, token configuration, and authorization failures in ASP.NET Core applications. Complex or production-specific authentication issues may require Standard, Premium, or a custom offer.
Can you fix Entity Framework Core and database errors?
Yes. I can diagnose EF Core queries, relationships, migrations, tracking behavior, database mappings, connection configuration, and related SQL Server problems. Large schema redesigns, data recovery, and major performance projects require a custom scope.
Do you also fix frontend or deployment problems?
This gig focuses on ASP.NET Core backend and Web API problems. I can inspect frontend requests or Docker configuration when they directly affect the agreed backend issue. Standalone UI work, cloud deployment, CI/CD setup, or infrastructure changes require a custom offer.
What does a revision cover?
A revision covers adjustments to the delivered fix if the originally documented issue is not resolved as agreed. A different bug, new feature, changed requirement, or unrelated problem is new scope and may require an extra or custom offer.
