I will fix and optimize your dot net core API and sql performance

I
irfanasghardev
I
irfanasghardev
Irfan A
fix and optimize your dot net core API and sql performance
Full Screen
fix and optimize your dot net core API and sql performance
Full Screen
fix and optimize your dot net core API and sql performancefix and optimize your dot net core API and sql performance

About this gig

Is your ASP.NET Core API slow, buggy, or not scaling well? I can help.

I'm a .NET Core backend developer with 5+ years of experience building 

and optimizing production-grade APIs. Whether your app has performance 

bottlenecks, security issues, or bugs that need fixing, I'll diagnose 

the root cause and deliver a clean, working solution.

WHAT I CAN FIX AND OPTIMIZE:

Slow API response times and database query performance (EF Core, Dapper)

SQL Server indexing, query optimization, and schema issues

Authentication/authorization bugs (JWT, OAuth2, Role-based access)

Caching implementation with Redis to reduce load

Microservices communication issues

Real-time features not working properly (SignalR, WebRTC)

Code refactoring for maintainability and scalability

Memory leaks and resource management issues


MY TECH STACK:

ASP.NET Core | EF Core | Dapper | SQL Server | Redis | JWT/OAuth2 | 

Microservices | SignalR | WebRTC | Web API | MVC


WHY WORK WITH ME:

- 5+ years hands-on experience with .NET Core in production environments

- I don't just patch bugs I explain the root cause so it doesn't come back

- Clear communication and realistic timelines

- Clean, documented code that your team can

  • Programming language

    • C#

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Source control

  • Frontend framework

    • Bootstrap
    • jQuery
    • React.js

  • Backend framework

    • ASP.NET Core

  • AI & low/no code builders

    • Claude
    • Cursor
    • Webflow

Get to know Irfan A

Irfan A

Full Stack Dot NET Core and React Developer

  • FromPakistan
  • Member sinceNov 2025
  • Avg. response time1 hour

  • Languages

    English
Full Stack .NET Core & React Developer with 5+ years building secure, scalable web apps for enterprise and healthcare systems. I specialize in ASP.NET Core REST APIs, React.js frontends, SQL Server database design, and JWT authentication — delivering clean, production-ready code. I take time to understand your requirements first, so the final product actually solves your problem. Message me with your project details — I'll respond within a few hours.

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