I will fix your backend bug or API issue

A
agustin_devel
A
agustin_devel
Agustin O.
Certaines informations sont présentées en anglais.
fix your backend bug or API issue
Plein écran
fix your backend bug or API issue

À propos de ce service

Your API is broken and you don't have time to dig through it yourself. 

I do.


I'm a backend developer with 5+ years of experience working with 

Node.js, Python, Go, Java, and C#. I fix bugs fast, explain what 

caused them, and make sure they don't come back.


WHAT I FIX:

API endpoints returning wrong data or crashing

Authentication/authorization issues (JWT, OAuth, sessions)

Database query bugs (Postgres, MySQL, MongoDB)

Integration failures (third-party APIs, webhooks, payment gateways)

Performance issues (slow endpoints, N+1 queries)

Deployment/environment bugs


HOW IT WORKS:

1. Send me your repo (GitHub/GitLab) or relevant code + error logs

2. I diagnose the issue and give you a quick estimate of time needed

3. I fix it, test it, and explain what went wrong

4. You review and confirm


WHY WORK WITH ME:

I don't just patch the symptom I find the actual root cause so 

the bug doesn't come back in a different form next week. You'll 

get a short explanation of what broke and why, in plain language.


Send me a message with details before ordering if your case is 

unusual or the bug is hard to describe happy to take a quick 

look for free to confirm I can help.

  • Plateforme

    • Autres

  • Type de site web

    • Boutique e-commerce
    • Business
    • Landing page
    • Blog
    • SaaS

  • Langage de programmation

    • C#
    • Go
    • Java
    • JavaScript
    • Python
    • Dactylographiés
    • HTML et CSS
    • React
    • ASP.NET
    • Autres
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Découvrez Agustin O.

Agustin O.

High Performance Web and Desktop Software Engineer

  • DeArgentine
  • Membre depuisaoût 2026

  • Langues

    Espagnol, Anglais
I am a Software Engineer with experience building offline-first ERP systems and interactive AI-powered platforms. I specialize in full-stack development using TypeScript, Python, and Go, with a focus on optimizing database performance and implementing scalable architectures like Microservices and DDD.

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