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I will fix asp net core web API bugs, errors and backend issues
Andres DC
About this gig
I will diagnose and fix bugs in your existing ASP.NET Core REST API.
I can help with backend issues such as HTTP 400, 401, 403, 404 and 500 errors, JWT authentication and authorization problems, Entity Framework Core issues, routing, controllers, validation, database logic, CORS, dependency injection, middleware, serialization, CRUD endpoints and unexpected backend exceptions.
You will receive:
Diagnosis of the reported issue
Fix for the agreed bug or affected flow
Basic verification of the fix
Updated source code
Short explanation of the root cause and changes made
Please provide a clear description of the problem, relevant error messages or logs, steps to reproduce it, and the affected endpoint or functionality.
This Gig is focused on debugging and fixing existing ASP.NET Core REST APIs. New modules, complete API development, major refactoring, deployment, third-party integrations and full security audits are not included unless agreed through a custom offer.
Get to know Andres DC
Andres DC
Full Stack Developer NET, Java, Node js REST APIs
- FromColombia
- Member sinceJan 2022
Languages
Spanish, English
Full Stack Developer with nearly 5 years of experience building and maintaining web applications, REST APIs and backend services. I work mainly with C#, .NET, Java, Node.js, PostgreSQL, Oracle and SQL, plus React, Angular and Vue.js. I have experience with API development and debugging, JWT authentication, database integrations, Docker, Git and automated testing. I focus on finding root causes and delivering clean, maintainable solutions.
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FAQ
What information do you need before starting?
Please provide a clear description of the issue, the error message or relevant logs, steps to reproduce the problem, and the affected endpoint or functionality.
What counts as one bug?
One bug is one specific reproducible issue or one closely related problem affecting a defined part of the application. Unrelated issues may require a custom offer.
Can you fix JWT authentication or authorization issues?
Yes. I can troubleshoot JWT authentication, roles, claims, token validation, and common 401 or 403 issues in ASP.NET Core.
Can you fix Entity Framework Core or database issues?
Yes, when they are related to the ASP.NET Core backend. This may include EF Core queries, mappings, CRUD operations, database exceptions, and connection issues.
Can you add new features?
This Gig is focused on debugging existing functionality. New features, modules, or major refactoring should be handled through a custom offer.
What if the issue cannot be reproduced?
I will investigate using the information, logs, and source code provided. If required information, dependencies, or environment details are missing, I may need additional details before continuing.
