Customize U²-Net for Background Removal

I’m looking for an experienced developer to build a background remover web app, similar to:
> https://freebiehive.com/free-ai-background-remover-online-freebiehive/

The tool should use U²-Net (U2Net) or a similar AI model for background removal.
Users should be able to:

Upload an image
Automatically remove the background
Preview and download the result (PNG with transparent background)

Requirements:
Experience with Python (preferably Flask or FastAPI)
Knowledge of U²-Net / image segmentation models
Frontend development (HTML, CSS, JS or React)
Ability to deploy the tool on a live server (e.g., AWS, Render, or similar)
Ability to help me with uploading it in my Wordpress website

Optional:
Add drag-and-drop upload
Simple modern UI like the example link
Option to process multiple images

Deliverables:
Fully functional web app
Source code and installation guide