I will fix erros for API integration

M
marie_smith00
M
marie_smith00
Marie S
fix erros for API integration
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fix erros for API integration
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fix erros for API integrationfix erros for API integrationfix erros for API integration

About this gig

I Will Fix Errors for API Integration | Debug, Connect & Optimize Your API


Are you struggling with API errors, failed integrations, authentication issues, or unexpected response problems?


I will professionally fix, debug, and optimize your API integration so your system runs smoothly, securely, and efficiently.


With solid experience working on REST APIs, third-party integrations, payment gateways, SaaS platforms, and custom backend systems, I help businesses eliminate integration issues fast and reliably.

Whether it's a frontend-to-backend connection problem, webhook failure, JSON parsing error, or authentication token issue Ive got it covered.


What I Can Fix


  • API integration errors
  • REST / SOAP API issues
  • Authentication (OAuth, JWT, API keys)
  • Webhook & callback problems
  • Payment gateway integration errors
  • Third-party API connection failures
  • JSON / XML response handling errors
  • CORS & server configuration issues
  • API timeout & performance optimization
  • Debugging 400 / 401 / 403 / 404 / 500 errors
  • Backend connection problems
  • api integration fix
  • rest api debugging
  • webhook error repair
  • oauth token issue
  • payment api fix
  • backend bug fixing
  • third party api integration
  • cors error solution

  • Expertise

    • Debugging
    • Performance
    • Design
    • Databases
    • Source control

  • Programming language

    • Python

  • Frontend framework

    • AngularJS
    • Bootstrap
    • React.js
    • Vue.js

  • Backend framework

    • Django
    • Express.js
    • Node.js

Get to know Marie S

Marie S

metertrader4, metertrader5, mt4 ea, mt5 ea

  • FromColombia
  • Member sinceAug 2025

  • Languages

    English, French
Hello and welcome to my profile. I’m a professional Forex Trading Bot Developer specializing in MetaTrader 4 (MT4) and MetaTrader 5 (MT5) platforms. With strong experience in algorithmic trading and automated strategy development, I help traders turn their ideas into fully functional, reliable, and optimized Expert Advisors (EAs). If you’re looking for a custom Forex bot, MT4 EA, or MT5 EA built around your unique strategy, risk management rules, and trading logic What I Do ✔ Develop custom MT4 Expert Advisors (MQL4) ✔ Develop custom MT5 Expert Advisors (MQL5)

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