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I will seamlessly integrate, test, and automate any rest API for your website or app

K
karvisnewt
K
karvisnewt
Karvis N
seamlessly integrate, test, and automate any rest API for your website or app
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seamlessly integrate, test, and automate any rest API for your website or app

About this gig

API Integration, Automation & Backend Building That Actually Works


Need your API to function smoothly and reliably?

Ill build, integrate, test, and automate any REST API for your website or appwhether its for eCommerce, travel, finance, SaaS, or a custom platform.


I specialize in creating secure, scalable, production-ready API systems, from scratch or on top of your existing backend, so everything runs without errors or downtime.


What Ill Do for You

  • Build custom REST APIs (Node, Firebase, etc.)
  • Secure API connection setup
  • REST endpoint integration (GET, POST, PUT, DELETE)
  • Authentication setup (API Keys, OAuth2, JWT, etc.)
  • Postman collection creation & environment testing
  • Webhook & automation setup
  • Error handling, logging & debugging
  • Sandbox production migration
  • Step-by-step guide or short video walkthrough



APIs I Can Build & Integrate

WooCommerce QuickBooks Zoho Stripe Paystack Amadeus Twilio Firebase Custom APIs



If your API is failing, slow, or confusing Ill build it and make it work the right way.

Message me and lets get started

  • Expertise

    • Algorithms & Data structures
    • Performance
    • Design
    • Databases

  • Programming language

    • JavaScript

  • Frontend framework

    • React.js
    • Bootstrap
    • Tailwind CSS

  • Backend framework

    • Django
    • Express.js
    • Node.js
    • Flask

Get to know Karvis N

Karvis N

Blockchain developer

  • FromRomania
  • Member sinceJun 2025
  • Avg. response time15 hours

  • Languages

    English, German, French, Spanish, Romanian
Welcome Here! I’m Newt, a certified Blockchain Developer with 5+ years in blockchain development. I’ve helped clients globally build tokens, presale systems, DApps, bridges, and DeFi platforms. I specialize in secure, scalable apps on Ethereum, BSC, Solana, Tron, Sui, TON, and Base. Whether you're starting fresh or upgrading a project, I deliver clean, production-ready solutions tailored to your needs. Let's build something great now.

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