I will fix javascript and react, nodejs bugs quickly and perfect

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marcus__1406
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marcus__1406
Marcus O
fix javascript and react, nodejs bugs quickly and perfect
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fix javascript and react, nodejs bugs quickly and perfect

About this gig

Is your JavaScript, React, or Node.js application not working properly?



Dealing with errors, broken features, failed API requests, or unexpected behavior? I can help you find the root cause and get your application working again.

I can fix:

  • JavaScript and React bugs
  • Node.js and Express backend issues
  • REST API and integration problems
  • Authentication and authorization errors
  • Database and backend issues
  • Console and runtime errors
  • State management problems
  • Performance issues
  • Code that needs refactoring


I don't just patch the visible error. I'll investigate the problem, identify the cause, implement the fix, and test the affected functionality.


Whether it's a small JavaScript bug, broken React component, failing API, or Node.js backend issue, I'll help get your project back on track.


Send me the error message, screenshot, or relevant code, and let's find the problem.

  • Platform

    • Custom

  • Website type

    • E-Commerce store
    • Business
    • Landing page
    • Blog
    • Portfolio

  • Programming language

    • JavaScript
    • HTML & CSS
    • Bootstrap
    • React
    • Other
Respect third-party rights

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Get to know Marcus O

Marcus O

Backend Focused Full Stack Developer, APIs, Authentication and Databases

  • FromNigeria
  • Member sinceMay 2022
  • Avg. response time1 hour

  • Languages

    English, German, French
Need a reliable backend for your web application? I'm Marcus, a backend-focused full stack developer specializing in API development, authentication, databases, and backend bug fixing. I help businesses and developers build REST APIs, implement secure authentication, integrate third-party services, and work with PostgreSQL, MySQL, and MongoDB. Whether you're building a new application or fixing an existing backend, I focus on clean, reliable, and maintainable solutions. Send me a message and let's discuss your project.

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