WebRTC Developer for Video Chat Website (Profit Share or Post-Payment Option)

I am looking for an experienced developer to improve the video chat website. The project is already partially completed (Frontend + Backend), and it needs to be brought to a stable and commercially ready product.

What is available:

HTML/CSS/JS (WebRTC) + PHP/MySQL

Registration, personal account, database

Working logic of the video chat (partially), but there are connection errors

What needs to be done:

Fix WebRTC connection (stable connection, signaling, matchmaking)

Add call notifications (accept/reject)

Refine chat and interface

Implement monetization system.

Enhance security (spam protection, data verification, user personal data protection)

Improve interface design (modern UI/UX, responsive layout)

Prepare the site for testing and launch

Skills:

WebRTC (experience with real projects is mandatory)

JavaScript, PHP, MySQL

Experience building stable P2P video chats and integrating payment systems

Knowledge in web application security (will be a plus)

Conditions:

Payment after successful project completion and first income or profit share.

Long-term cooperation with prospects for joint project development.