I will make rest apis and backend for your websites


About this gig
Are you looking to connect third-party services, payment gateways, or custom backend functionality to your web or mobile application?
A broken or poorly structured API integration can ruin user experience, compromise security, and cause data loss. As a specialized MERN Stack backend engineer, I develop and integrate highly secure, scalable, and optimized REST APIs tailored to your system's requirements.
What I Can Integrate For You:
- Payment Gateways: Stripe, PayPal, Razorpay, Braintree
- Authentication: JWT, OAuth, Google, Apple, Facebook Login
- Communication: Twilio (SMS/Calls), SendGrid, Mailchimp, Push Notifications
- Mapping & Location: Google Maps API, Mapbox
- External Platforms: Shopify API, Firebase, AWS S3, OpenAI/ChatGPT API
- Custom Endpoints: Custom CRUD API creation using Node.js, Express.js, and MongoDB/SQL
What You Will Receive:
- 100% clean, modular, and documented code
- Secure data parsing and rigorous error handling
- Post-integration verification and testing to ensure zero downtime
Please drop a message with your project details and current documentation before placing an order to ensure technical compatibility.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Sandy
Ful Stack MERN , React Native Developer, Scalable Web and Mobile Solutions
- FromPakistan
- Member sinceMar 2022
Languages
English
My Portfolio
FAQ
Do I need to provide the API documentation and credentials?
Yes. To begin the integration, you will need to provide the official API documentation and access keys (Sandbox/Testing keys are preferred for safety during development).
Can you build a custom API from scratch instead of just integrating an existing one?
Absolutely. If you select the Premium package (or message me for a custom quote), I can design and architect a secure, custom REST API from scratch using Node.js, Express.js, and your choice of database (MongoDB, MySQL, or PostgreSQL).
Will you need direct access to my source code?
Yes, I will need access to the relevant part of your repository (GitHub/GitLab) or the source code files to inject and configure the integration seamlessly.
What if the API changes or breaks later?
I guarantee the integration works perfectly with the current API version at the time of delivery. If the third-party service updates its API infrastructure in the future, I offer maintenance services to update your code under a small, separate contract.

