I will fix rest API issues, errors, and integration bugs

A
ahsan_483
A
ahsan_483
Ahsan Mehmood
fix rest API issues, errors, and integration bugs
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fix rest API issues, errors, and integration bugs
Full Screen
Full Screen
fix rest API issues, errors, and integration bugsfix rest API issues, errors, and integration bugsfix rest API issues, errors, and integration bugs

About this gig

Are you struggling with your REST API or backend integration? I am a professional software engineer with extensive experience in debugging and fixing APIs. I can help you resolve errors, integration issues, and performance problems quickly and efficiently.


My services include:

- Fixing REST API errors (400, 401, 403, 404, 500)

- Debugging JSON request/response issues

- Resolving authentication problems (tokens, headers, OAuth basics)

- Fixing API integration with frontend or third-party services

- Debugging database-related API issues

- Performance and timeout optimization


Technologies I work with: .NET, Python (Flask, FastAPI), Node.js, SQL databases, Postman, Swagger.  


Even if your API is not strictly REST-based, feel free to contact me Ill review it and guide you. Fast, reliable, and fully tested solutions guaranteed!


  • Programming language

    • ASP.NET

  • Expertise

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

  • Frontend framework

    • React.js
    • AngularJS
    • Vue.js
    • jQuery
    • Next.js

  • Backend framework

    • Django
    • Laravel
    • Express.js
    • Node.js
    • Next.js

Get to know Ahsan Mehmood

Ahsan Mehmood

Fullstack Developer

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

  • Languages

    English
I’m Ahsan Mehmood, a professional .NET Developer expert in C#, ASP.NET Core, Web API, Microservices, Azure, SQL, and Automation/Scraping. I build high-performance backends, real-time apps, cloud-ready systems, and secure integrations. I deliver clean architecture, fast delivery, and production-ready code. Need APIs, dashboards, automation bots, CI/CD, or full-stack solutions? I’ll build it with accuracy, speed, and reliability.

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