Next.js Dashboard with n8n Automation Integration

I need an experienced Next.js and n8n developer to build a functional automation dashboard for a small business workflow.

The application should allow users to submit information through a clean Next.js interface. After submission, the data must be sent to an n8n webhook, processed through an automated workflow, and returned to the application with a clear success or error status.

Required functionality:
- Build a responsive interface with Next.js and React
- Create form validation and submission handling
- Connect Next.js to n8n using webhooks or REST APIs
- Configure n8n to process and route the submitted data
- Integrate at least one external service or API
- Display workflow results and error messages in the dashboard
- Add basic loading states and secure environment-variable configuration
- Test the complete frontend-to-n8n workflow

The code should be clean, reusable, and easy to extend. I will provide the exact workflow requirements, credentials, and design direction to the selected freelancer.

Please apply only if you have practical experience with both Next.js and n8n. Include a brief example of a similar automation project you have completed.