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Fiverr Pro
English
$
USD
I will build API integrations and custom backend functionality
Ali Raza
About this gig
Need to connect two systems, fix a broken API, or build custom backend logic?
I develop reliable API integrations and backend functionality for websites, ecommerce stores, SaaS platforms and internal business systems.
I can help with:
- REST API integration
- Third-party service connections
- Custom backend functionality
- Webhooks and event-based workflows
- OAuth, tokens and API authentication
- Payment gateway integrations
- CRM, ERP and business system connections
- Database integration and data synchronization
- JSON/XML data handling
- Custom PHP backend development
- API debugging and error fixing
- Existing system modification and extension
I focus on clean, secure and maintainable backend development built around your actual business workflow.
Whether you need one endpoint connected or a complete multi-system integration, I can analyze the requirement, handle the backend logic and make the systems communicate reliably.
Please message me before ordering if your project involves multiple APIs, complex authentication, database synchronization or advanced business workflows so I can recommend the correct package.
Get to know Ali Raza
Ali Raza
Senior FullStack Developer, Custom Software and AI Solutions
- FromPakistan
- Member sinceJul 2022
Languages
Urdu, English
I am a Senior Full-Stack Developer and Technical Lead with 16+ years of experience building custom web applications, ecommerce platforms, SaaS, ERP/CRM systems, business automation and AI-powered solutions. I work across frontend and backend using React, Next.js, JavaScript, TypeScript, PHP, Laravel, Node.js, Python, databases and APIs. I specialize in complex business logic, custom integrations, Shopify/WooCommerce, booking systems, dashboards, debugging, deployment and scalable software architecture.
My Portfolio
FAQ
Can you integrate any third-party API?
Yes. I can integrate REST APIs and many third-party services where proper API documentation and required access credentials are available.
Can you fix an existing API integration that is not working?
Yes. I can debug authentication issues, incorrect requests, webhook failures, response handling, data mapping and backend logic problems.
Do you build custom backend functionality from scratch?
Yes. I can develop custom PHP backend logic, endpoints, workflows, database operations and business-specific functionality.
Can you connect two different systems together?
Yes. I can connect websites, ecommerce stores, CRMs, ERPs, payment services and other systems using APIs, webhooks or custom middleware.
Do you work with API authentication such as OAuth and tokens?
Yes. I can implement API keys, bearer tokens, OAuth and other authentication methods supported by the service.
Can you integrate APIs with a database?
Yes. I can store, update, synchronize and process API data using databases such as MySQL. Database work may require the Standard, Premium or a custom offer.
Can you work with webhooks and automated workflows?
Yes. I can create and troubleshoot webhook-based workflows for payments, orders, notifications, status changes and other events.
Which package should I choose?
Basic is for one small API fix or simple connection. Standard is for one complete custom integration. Premium is for multiple endpoints, systems or advanced backend workflows.
Should I contact you before placing an order?
For small and clearly defined tasks, you can order directly. For multiple APIs, database synchronization, OAuth or complex workflows, please message me first.
Will you provide the source code?
Yes. Source code is included in my packages, along with structured implementation and clear comments where appropriate.
