I will integrate rest API, third party API, webhook and custom API integration

J
johnjamesv
J
johnjamesv
JOHN J
integrate rest API, third party API, webhook and custom API integration
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integrate rest API, third party API, webhook and custom API integration

About this gig

Need a reliable API integration that works smoothly with your website, application, or business system?


I provide professional API integration services to connect your platform with third party services, REST APIs, webhooks, payment gateways, CRMs, and other external systems.


What I can help with:

  • REST API & third party API integration
  • Webhook setup and integration
  • API authentication (API keys, OAuth)
  • Data exchange using JSON
  • Payment and business API integration
  • API troubleshooting and error fixing
  • Custom API connections and automation
  • Testing and documentation


I focus on clean, secure, reliable integrations that work exactly as required.


Please message me before placing an order and send the API documentation, your platform/technology, the service you want to connect, and a brief explanation of what you need. Ill review your requirements and recommend the best approach.


Lets get your APIs connected and working properly.

  • Expertise

    • Debugging
    • Security
    • Operating systems
    • Design
    • Databases

  • Programming language

    • JavaScript

  • Frontend framework

    • Flutter
    • Foundation
    • React.js
    • Svelte

  • Backend framework

    • FastAPI
    • Fastify
    • Next.js
    • Node.js
    • Strapi

Get to know JOHN J

JOHN J

API Integration Developer

  • FromPortugal
  • Member sinceAug 2026
  • Avg. response time1 hour

  • Languages

    English, German, Spanish
Backend developer specializing in API integration, REST API, Webhook, Stripe API, ChatGPT API, Shopify API, CRM API, n8n, Make.com, and payment gateway integration. I build secure, scalable, and reliable API solutions using PHP, Node.js, and Python. From automation and third-party integrations to API debugging and custom backend development, I deliver clean code, fast communication, and quality results.

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