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I will fix bugs in your nodejs backend or rest api

L
leofernandez20
L
leofernandez20
Leonel F.
fix bugs in your nodejs backend or rest api
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fix bugs in your nodejs backend or rest api

About this gig

I will help you fix bugs and issues in your website, backend, or API quickly and efficiently.

I am a full stack developer specialized in backend systems, APIs, databases, and business applications. I can analyze problems, debug code, and implement reliable solutions to make your system work properly again.

If your website or application has errors, crashes, or unexpected behavior, I will identify the root cause and fix it.

What I can fix

Backend bugs

API errors

Database issues

Server errors

Integration problems

Website functionality problems

Performance issues

Technologies I work with

Node.js

Express.js

MySQL / SQL databases

REST APIs

JavaScript

Backend systems

Why choose me

Clean and professional solutions

Fast communication

Clear explanations of the problem

Reliable fixes

If you are not sure which package to choose, feel free to contact me before ordering.

  • Website type

    • Saas

  • Programming language

    • HTML & CSS
    • JavaScript
    • Node.js

  • Website features

    • Inventory
    • Analytics
    • Form
    • Dashboard
    • User Authentication
    • Admin Panel
Respect third-party rights

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Get to know Leonel F.

Leonel F.

Full Stack Developer Nodejs APIs and Business Softw

  • FromArgentina
  • Member sinceMar 2026
  • Avg. response time4 hours

  • Languages

    Spanish, English
I am a Full Stack Developer specialized in backend systems and business management software. I build REST APIs, inventory systems, admin dashboards and automation tools using Node.js, Express, React and SQL databases. Recently I developed a business management system for hardware stores that imports supplier Excel lists, calculates prices automatically and manages inventory. I focus on clean architecture, reliable backend systems and practical solutions for real businesses.

My Portfolio

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