You will get Fix ASP.NET Core API Errors, Exceptions, EF or JWT Issues
Project details
I provide fast and reliable ASP.NET Core bug fixing for APIs, EF Core, JWT, routing, and performance issues. With real production experience, I quickly identify the root cause, fix the error, test everything, and deliver clean, stable, and well-structured code. Your API will work smoothly and without failures.
Programming Languages
ASP.NET, C#Coding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$20
|
Standard
$40
|
Advanced
$60
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | - | |
Detailed Code Comments | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$15
Additional Revision
+$10Frequently asked questions
About Nadir
Senior .NET Core Backend Developer | API, SQL, Docker, DevOps
Baku, Azerbaijan - 6:33 am local time
I specialize in creating secure, scalable, and high-performance back-end systems, and I’ve worked on real projects such as:
Enterprise management platforms
Education portals with messaging, file management, NFC student cards
API systems for mobile apps
CRM-like solutions for businesses
✔ What I can do for you:
ASP.NET Core API development (REST, CRUD, authentication)
SQL Server & PostgreSQL (queries, indexing, optimization)
Entity Framework Core (Code First, Migrations)
Clean Architecture, Repository & Unit of Work
Docker, Linux (Ubuntu), Nginx, CI/CD deployments
Fixing bugs, improving performance, refactoring legacy code
API integration & documentation
Long-term maintenance and support
✔ Why clients choose me:
Strong problem-solving + debugging skills
Clear communication and fast delivery
Professional, production-ready code
Experience working with real business systems
Full responsibility from development to deployment
If you need a dependable developer who can handle both backend development and server deployment, I’m ready to help.
Let’s work together and bring your project to the next level.
Steps for completing your project
After purchasing the project, send requirements so Nadir can start the project.
Delivery time starts when Nadir receives requirements from you.
Nadir works on your project following the steps below.
Revisions may occur after the delivery date.
Analyze the reported issue
I will review the error description, logs, screenshots, and code to identify the root cause of the problem.
Fix the bug and test the solution
I will apply the required fix, refactor code if necessary, and test the API endpoints to ensure the issue is fully resolved.