Browse categories
Explore
Fiverr Pro
English
$
USD
I will do API integration, pipeline setup and build CRM dashboards
smh-developer
Level 1
About this gig
Need to connect your app to third-party services?
I specialize in API integration, payment gateway setup (Stripe, PayPal, Square), ringba, retreaver and building custom REST/GraphQL APIs.
My services include:
- Stripe, PayPal, Razorpay payment integration
- Third-party API connections (CRM, shipping, social media, AI)
- Custom REST and GraphQL API development
- Webhook implementation and error handling
- API documentation and Postman collection
- OAuth, JWT authentication setup
Tech stack: Node.js, Python, Next.js, Express, Fast API, React.js
I deliver clean, well-documented, production-ready code with proper error handling. Every integration is thoroughly tested.
Message me with your project details for a free assessment.
Get to know smh-developer
smh-developer
Building Fast, Responsive Websites with Node Next js
Level 1
- FromPakistan
- Member sinceMay 2025
- Avg. response time1 hour
- Last delivery3 weeks
Languages
Urdu, English, Arabic
𝐅𝐮𝐥𝐥-𝐬𝐭𝐚𝐜𝐤 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 specializing in 𝚠𝚎𝚋 𝚊𝚙𝚙𝚜, 𝙰𝙿𝙸 𝚒𝚗𝚝𝚎𝚐𝚛𝚊𝚝𝚒𝚘𝚗𝚜, and 𝚋𝚞𝚜𝚒𝚗𝚎𝚜𝚜 𝚊𝚞𝚝𝚘𝚖𝚊𝚝𝚒𝚘𝚗. I build custom websites in React and Next.js, integrate payment gateways (Stripe, PayPal), and create WhatsApp AI chatbots using Meta API. I set up n8n, Make.com, and Zapier automation workflows, manage Ringba and Retreaver pay-per-call accounts, and build scalable backends for Lovable and Replit frontends. From no-code to full-code rebuilds to CRM dashboards — I deliver clean, production-ready solutions. Message me with your project.
My Portfolio
Other Software Development Services I Offer
FAQ
Which payment gateways do you support?
I work with Stripe, PayPal, Square, Razorpay, Braintree, Paddle, LemonSqueezy, and most major payment processors. I can implement one-time payments, recurring subscriptions, invoicing, refund handling, and webhook-based payment confirmations.
What programming languages and frameworks do you work with?
I work with Node.js (Express, NestJS), Python (Django, FastAPI, Flask), PHP (Laravel), Next.js, and React for frontend integration. I can also work with existing codebases regardless of framework. Share your current tech stack and I will confirm compatibility.
Will my existing application need major changes for the integration?
In most cases, no. I design integrations to plug into your existing codebase with minimal changes. Before starting, I review your current architecture and provide a clear plan showing exactly what will be added or modified. No surprises.
Do you provide API documentation after the work is done?
Yes. Every project is delivered with clear documentation including endpoint details, request and response examples, error codes, and a Postman collection you can use for testing. My Premium package includes comprehensive technical documentation your team can reference.
How do you handle security for payment integrations?
Security is my top priority. I follow PCI compliance best practices, never store raw card data on your server, use server-side processing for all sensitive operations, implement webhook signature verification, and set up proper authentication (OAuth 2.0, JWT) for all API endpoints.
Can you fix or upgrade an existing API integration that is not working properly?
Yes, I frequently debug and optimize existing integrations. Common fixes include broken webhook handlers, authentication failures, rate limiting issues, and error handling gaps. Share your current setup and the problem you are facing, and I will provide a solution plan.
