I will develop rest API, soap API and third party API integration

N
nellycom
N
nellycom
Nelly
develop rest API, soap API and third party API integration
Full Screen
develop rest API, soap API and third party API integration
Full Screen
develop rest API, soap API and third party API integrationdevelop rest API, soap API and third party API integration

About this gig

Are you looking for a professional developer to build, fix, or integrate REST API or SOAP API for your web or mobile application? I will help you create secure, scalable, and high-performance APIs that allow smooth communication between your systems and third-party services.


I specialize in REST API development, SOAP API integration, SOAP to REST conversion, and connecting external services like payment gateways, CRM, ERP, and other platforms.


Whether you need a new API built from scratch or want to fix existing API issues, I will deliver a reliable solution tailored to your project.


Services I offer include

REST API development, SOAP API integration, API bug fixing, authentication systems (JWT/OAuth), JSON/XML handling, database integration (MySQL/MongoDB), API testing with Postman, and Swagger documentation. I also ensure proper structure, security, and scalability for production use.


You will get clean and optimized code, fast and secure performance, well-tested APIs, and clear documentation for easy integration.


I focus on delivering APIs that are not only functional but also efficient, secure, and ready for real-world use in web, mobile, and enterprise systems.

  • Programming language

    • JavaScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Frontend framework

    • Angular
    • Next.js
    • Preact
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • Django
    • Express.js
    • FastAPI
    • Node.js
    • Spring

  • AI & low/no code builders

    • Firebase Studio
    • Cursor
    • Replit
    • Webflow
    • Retool

Get to know Nelly

Nelly

develop REST API, SOAP API and integrate third party APIs

  • FromUnited Kingdom
  • Member sinceMay 2026

  • Languages

    German, English, French
Need a professional REST API or SOAP API developer for your web app, mobile app, SaaS platform, CRM, ERP, or third party API integration? I specialize in REST API development, SOAP API integration, SOAP to REST conversion, API debugging, JSON/XML handling, authentication, payment gateway integration, API automation, Swagger documentation, Postman collections, and secure backend API solutions using Node.js, FastAPI, Django, Laravel, Express.js, and more. Expect clean code, fast delivery, scalable architecture, and reliable communication for every project.

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