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Fiverr Pro
English
$
USD
I will integrate payment gateways and build custom backend apis
Zain Amjad
Level 2
About this gig
Want a reliable backend that connects seamlessly with the services your app depends on?
I connect APIs to web and mobile apps, ensuring smooth communication between systems with clean, efficient, and production-ready code.
Whether it is third-party services, payment systems, or custom backend logic, I handle everything with proper structure and security standards.
My goal is to make your application fully connected, automated, and reliable.
What I Can Build
REST API connections
Third-party service setup
Payment gateway setup (Stripe and others)
Firebase and Node.js backends
Custom backend systems from scratch
Error handling and testing
Secure implementation
I focus on clean architecture, proper error handling, and secure communication between services.
Let's Discuss First
Kindly send me a message before ordering so we can review your documentation and project scope to ensure the best strategy.
Get to know Zain Amjad
Zain Amjad
Full Stack Web Developer, Nextjs, React and Nodejs
Level 2
- FromPakistan
- Member sinceJul 2023
- Avg. response time1 hour
- Last delivery1 week
Languages
English, Urdu
I'm a Full-Stack Developer specializing in Next.js, React, Node.js, TypeScript, and modern web technologies.
I build fast, scalable, and production-ready web applications for startups, businesses, and entrepreneurs. Whether you need a SaaS platform, dashboard, custom web application, REST API, AI-powered feature, or a complete frontend and backend, I can help turn your idea into a working product.
If you have an idea, existing application, or technical problem, feel free to reach out and let's discuss how I can help.
My Portfolio
Other AI Development Services I Offer
FAQ
Which APIs do you support?
Any REST / third-party API.
Which APIs have you worked with before?
I have integrated OpenAI, ElevenLabs, Stability AI, Stripe, Twilio, Firebase, Google APIs, AWS services, and many other REST and third-party APIs.
Can you integrate an AI API like ChatGPT into my existing app?
Yes, I can integrate OpenAI GPT-4, ElevenLabs, DALL-E, Stable Diffusion, and other AI APIs into your existing web application cleanly and securely.
Do you handle API authentication and security?
Yes, I implement proper API key management, OAuth flows, token-based authentication, and rate limiting to keep your integration secure.
Can you build a custom backend API from scratch?
Yes, I can design and develop a full RESTful API using Node.js and Express with proper routing, middleware, error handling, and database connection.
Will you test the API integration before delivery?
Yes, all integrations are tested thoroughly before delivery to ensure they work correctly across different scenarios and edge cases.
Can you integrate payment gateways like Stripe?
Yes, I can integrate Stripe, PayPal, or other payment processors including subscription billing, webhook handling, and payment status tracking.
Do you provide documentation for the integration?
Yes, I provide clear documentation and code comments so your team can understand, maintain, and extend the integration easily.
Can you work with an API that has limited documentation?
Yes, I can analyze the API behavior, test endpoints, and build a reliable integration even when documentation is incomplete or unclear.
