I will fix and improve your nodejs or nestjs backend API

Y
yefersondev
Y
yefersondev
Yeferson Garcia
fix and improve your nodejs or nestjs backend API
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fix and improve your nodejs or nestjs backend API

About this gig

Is your Node.js or NestJS backend returning errors, failing API requests, or behaving unexpectedly?

I can investigate the issue, identify the root cause, and implement a clean and maintainable fix.

I am a Software Engineer with 8+ years of professional experience building backend services, APIs, integrations, and cloud-based applications.

I can help you with:

  • Node.js and NestJS backend bugs
  • REST API errors and unexpected responses
  • Business logic issues
  • Database-related problems
  • Third-party API integration issues
  • Authentication and validation bugs
  • TypeScript errors
  • Backend performance and code improvements

What you will receive:

  • Investigation of the problem
  • Clear identification of the root cause
  • Clean and maintainable code changes
  • Explanation of the solution

Please contact me before ordering and briefly describe the issue. I will review it and recommend the appropriate package based on its complexity.

  • Programming language

    • TypeScript

  • Expertise

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

  • Frontend framework

    • Angular
    • Bootstrap
    • jQuery
    • React.js
    • Tailwind CSS

  • Backend framework

    • Express.js
    • NestJS
    • Node.js

Get to know Yeferson Garcia

Yeferson Garcia

Backend Developer specializing in Nodejs Azure and AI

  • FromSpain
  • Member sinceSep 2026
  • Avg. response time1 hour

  • Languages

    Spanish, English
I am a Backend and Full Stack Software Engineer with 8+ years of professional experience. I specialize in Node.js, TypeScript, NestJS, REST APIs and Microsoft Azure, with additional experience in React, Angular, PostgreSQL, MongoDB and Docker. I currently build backend solutions that integrate AI models using OpenAI APIs, Azure OpenAI and Microsoft Foundry. I can help you build APIs, fix backend applications, integrate third-party services, deploy to Azure and add AI capabilities to existing software.

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