Bubble.io Messaging and Subscription Integration

I need an experienced Bubble.io developer to help with the following:
1. Messaging System
- Set up a real-time messaging feature for users to send/receive messages within the app.
- Can be implemented using a Bubble chat plugin or reliable third-party integration (e.g., CometChat, Agora, or Firebase).
- The system must be simple, clean, and user-friendly.

2. Payment Gateway (Paystack) Integration
- Enable subscriptions/payments so users can unlock premium features.
- Connect the app to Paystack using API keys (via plugin or Bubble’s API Connector).
- Ensure payment verification, error handling, and smooth user experience.

Ideal Skills and Experience:
- Strong experience with Bubble.io development.
- Familiarity with API integrations (especially payment gateways like Paystack).
- Experience setting up chat/messaging features on Bubble.io.