I will integrate third party apis, webhooks and external services

V
veysibisen
V
veysibisen
Veysi Bisen
integrate third party apis, webhooks and external services
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integrate third party apis, webhooks and external services

About this gig

Modern applications rarely live alone they need to talk to payment providers, CRMs, ERPs, e-commerce platforms, and custom APIs.


I help you connect all the dots by building reliable, well-documented integrations between your system and any third-party service.


What I can do for you

  • Integrate REST / JSON / XML based APIs
  • Implement and consume webhooks (payments, order updates, events)
  • Build backend endpoints to communicate with external services
  • Handle authentication (API keys, OAuth2, JWT, HMAC, custom headers)
  • Add logging, retry logic and error handling for production use
  • Write clear technical documentation / Postman collections


Typical integrations

  • Payment gateways: Stripe, PayPal, local providers
  • E-commerce: Shopify, Ikas, WooCommerce APIs
  • CRM / ERP systems (including Odoo or custom ERPs)
  • Email / notification services (SendGrid, SMTP, etc.)
  • Any custom REST API with proper documentation


If youre not sure whether your integration is possible, just send me the API docs and Ill check it for you.

  • Expertise

    • Algorithms & Data structures
    • Performance
    • Design
    • Databases
    • Source control

  • Frontend framework

    • React.js
    • AngularJS
    • Vue.js

  • Backend framework

    • Django
    • Spring
    • Node.js
    • Other

Get to know Veysi Bisen

Veysi Bisen

Scalable Solutions, Clean Code and Clear Communication

4.8(9)
  • FromTurkey
  • Member sinceJun 2022
  • Avg. response time3 hours
  • Last delivery4 months

  • Languages

    English, Turkish
Hi there! I'm Veysi, a freelance software developer who builds powerful, sustainable, and scalable solutions using .NET Core, RabbitMQ, PostgreSQL, and Vue.js. With 4+ years of corporate experience, I now shape my career freely through freelance projects. From high-traffic systems to integration solutions, from API development to queue-based architectures, I work with a productive and solution-oriented approach. I don’t just write code - I act as a solution partner. I care about clear communication as much as I care about clean code - because every great project starts with it.

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