WebAR Online SaaS

We have our front-end developed and looking for a backend developer to develop WebAR SaaS.

WebAR Reference URLs:
https://mywebar.com/ (Follow this for User Interface)
https://www.8thwall.com/ (Extra feature example and face tracking)
https://www.plattar.com (Extra feature example)

Features:
- User login
- Subscription - Payment gateway (free tier and paid tier)
- Markerless AR (Deploy 3D models on the floor without the need for any image)
- Marker-Based AR (Deploy 3D models by tracking images such as flyers, brochures, etc)
- Face AR (Wear glasses or mask)
- User experience on mobile (QR Code scan to open website)
- No Export feature (We don't want users to be able to export to host on their website
- Admin login (Able to view all subscribed users, and make changes)
WebAR Reference URLs:
https://mywebar.com/ (Follow this for User Interface)
https://www.8thwall.com/ (Extra feature example and face tracking)
https://www.plattar.com (Extra feature example)

Editor Import features:
- Able to import 3D models (Static/ animated)
- Able to import Picture/ Videos/ Audio
- Able to set interactive points for a popup.
- Able to type in Youtube URL to stream video without uploading video to project
- Able to type in text and use different fonts, colors, styles, sizes, etc.

Editor Export features:
- QR Code for mobile web preview
- URL for desktop/laptop to preview
- Users should not be able to export the whole website or package so that they can host it on their website.

What I need from you to award this project:
- Portfolio of any similar work or other SaaS work
- Development Cost
- Timeline and Milestone
- Your team strength