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Fiverr Pro
English
$
USD
I will develop graphql API, rest API integration and custom backend development
HEIEV
About this gig
Is your API not working as expected?
I help solve API and backend problems that can cause failed requests, broken integrations, errors or unexpected behavior.
I can help with:
- REST API development and integration
- GraphQL API development
- API troubleshooting and debugging
- Custom backend development
- Database integration
- API authentication and security
- Backend performance issues
Whether you need to fix an existing API issue, connect your application to an API, or build a custom backend solution, I focus on finding the problem and implementing a practical solution.
Tell me what is not working, what you need to integrate or what you want to build and lets find the right solution.
Get to know HEIEV
HEIEV
Nodejs Backend Developer, API and Backend Problem Solver
- FromUnited States
- Member sinceJun 2026
- Avg. response time2 hours
Languages
English, Spanish, German
Hi, I’m Heiev. I help businesses and developers solve backend problems that stop their applications from working properly. I troubleshoot and fix API errors, failed integrations, broken webhooks, Stripe/payment issues, Node.js backend bugs, and other server-side problems. Instead of just adding more code, I focus on finding the actual cause of the problem and fixing it properly. If your API is failing, an integration isn’t working, or your backend is giving unexpected errors, send me the details and I’ll help you find a practical solution.
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FAQ
Can you fix an existing API that is not working?
Yes. I can investigate API errors, failed requests, broken integrations, authentication issues, and unexpected API behavior.
Can you develop a custom REST or GraphQL API?
Yes. I can develop custom REST or GraphQL APIs based on your application's requirements and backend needs.
Can you integrate an API into my existing application?
I can connect your application to an existing API and troubleshoot issues affecting requests, responses, authentication, or data flow.
Do you work with databases?
Yes. Database integration can be included when your API or backend solution requires storing, retrieving, or managing application data.
What do you need from me to get started?
Please provide your project details, the problem you are experiencing, relevant API documentation or access, and any error messages or code needed to investigate the issue.
Can you work on an existing backend instead of building from scratch?
Yes. I can review an existing backend, identify the problem, and implement the necessary changes or improvements.
