I will fix bugs and optimize your asp net core API

O
oguzhangungors
O
oguzhangungors
Oguzhan Sonmez
fix bugs and optimize your asp net core API
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fix bugs and optimize your asp net core API

About this gig

Facing frustrating bugs, compilation errors, or performance bottlenecks in your .NET application? Lets get it fixed properly. 


As a dedicated Backend Developer, I specialize in debugging, maintaining, and optimizing robust systems. I will clean your code and ensure your Web API runs flawlessly using professional architectural standards.


What I Can Fix & Optimize For You:

- Application Errors: Resolving broken dependencies, runtime crashes, and syntax bugs.

- Web API & Routing: Fixing endpoints, HTTP status codes, and request/response models.

- Auth & Security: Troubleshooting JWT Bearer tokens and Identity setups.

- Database & EF Core: Optimizing slow SQL Server queries, migration issues, and LINQ bottlenecks.

- Refactoring: Cleaning up messy code and aligning it with Clean Architecture principles.


Why Work With Me?

- Clean & Well-Commented Code: You will get readable, maintainable architecture.

- Deep Technical Expertise: Strong command of C#, .NET Core, and relational databases.

- Fast Turnaround: Quick debugging to get your system back online.


Please message me before placing an order so we can discuss your specific bug and review the codebase!

  • Programming language

    • C#

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Security
    • Databases

  • Frontend framework

    • Angular
    • AngularJS
    • Bootstrap
    • jQuery
    • Vue.js

  • Backend framework

    • Django
    • Next.js
    • Node.js

Get to know Oguzhan Sonmez

Oguzhan Sonmez

Full Stack NET Developer and Web API Specialist

  • FromTurkey
  • Member sinceJun 2026
  • Avg. response time1 hour

  • Languages

    Turkish, English
Dedicated Backend Engineer specializing in scalable, secure, and high-performance Web APIs using C#, .NET Core, and SQL Server. My development philosophy is rooted in clean code, relying on enterprise design patterns to deliver production-ready software solutions. Technical Expertise: - Architecture: Clean Architecture, CQRS Pattern (MediatR), Domain-Driven Design (DDD). - Database: Entity Framework Core (Code-First), Fluent API, SQL Server optimization. - Workflows: Background Tasks & Asynchronous Hosted Services.

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