Modification of source code for a dating application

Hello,

We have an open-source code for a video and audio dating application (one-to-one) and would like to make some modifications and additions to it. Below are the specific requirements:

Language Update:

The application’s language has been changed from Chinese to Arabic, but some texts and elements still appear in Chinese. We believe these can be updated from the backend, and we need them fully replaced with Arabic.
Modify Registration Options:

Currently, the app allows registration via phone number and WeChat. We would like to remove the WeChat option and add registration via Gmail or email.
Logo Update:

We have a new logo ready, and we would like it to be integrated into the application, replacing the current one.
Redesign Login Screen:

We want to replace the current login screen with a new design that aligns better with our application's concept and requirements.
Payment Gateways:

We would like to remove all existing payment gateways and integrate the application with Stripe for seamless payment processing.
Integration with Agora.io:

We want to connect the app with the Agora.io platform to enhance live streaming and video call functionality.
Requirements: We are looking for a developer or team with extensive experience in live-streaming applications who can implement these changes efficiently and quickly. Additionally, we are looking for a competitive price for this collaboration.