I will develop node js rest API, monthly backend maintenance monitoring and API support

V
victormandalin
V
victormandalin
Victor M
develop node js rest API, monthly backend maintenance monitoring and API support
Full Screen
develop node js rest API, monthly backend maintenance monitoring and API support
Full Screen
develop node js rest API, monthly backend maintenance monitoring and API supportdevelop node js rest API, monthly backend maintenance monitoring and API support

About this gig

Broken APIs, slow backend performance, or failed integrations can stop your entire product.


I help founders and businesses fix, debug, and optimize backend APIs for AI apps, SaaS platforms, and mobile applications quickly and professionally.


Whether your backend is crashing, returning errors, running slow, or failing during integrations, I will identify the issue and apply clean, scalable fixes instead of temporary patches.


Backend Technologies I Fix and Optimize:

Node.js (Express / NestJS)

Python (FastAPI / Django)

REST and GraphQL APIs

PostgreSQL, MySQL, MongoDB

Firebase and Supabase

Authentication (JWT, OAuth)

Stripe and payment APIs

OpenAI / AI API integrations

Third-party APIs and webhooks


Common issues I fix:

API errors and crashes

Slow response times

Authentication bugs

Database performance issues

Broken webhooks and integrations

Deployment and environment errors


You will get clear fixes, clean code, and explanations so your backend runs smoothly again.


Message me with the issue details before ordering for a quick assessment.

  • Programming language

    • C&C++

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Operating systems
    • Databases

  • Frontend framework

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

  • Backend framework

    • Django
    • Laravel
    • Other

  • AI & low/no code builders

    • Lovable
    • Firebase Studio
    • Base44
    • Bubble
    • FlutterFlow
    • Thunkable

Get to know Victor M

Victor M

Secure and Scalable Backend Development, API Fixes and Long Term Maintenance

  • FromUnited Kingdom
  • Member sinceJan 2026

  • Languages

    English
I am Victor, an expert backend developer for web apps, mobile apps, and AI SaaS platforms, delivering secure, scalable, and high performance backend solutions. I build, fix, and maintain backends using Python, Node.js, Django, FastAPI, Flask, Express, REST and GraphQL APIs, PostgreSQL, MySQL, MongoDB, AWS, Docker, JWT and OAuth authentication. I handle backend bug fixes, API development, database optimization, server deployment, and long term backend maintenance to keep your software running smoothly.

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