Comprehensive Admin and Integration Setup

I'm looking for someone to set up an integrated admin panel for my platform. The project includes:

Payment Gateway Integration:
- Integrate Tng and QR code, bank

Live Chat Setup:
- Implement text chat with file sharing capabilities

Deposit Calculator:
- Create both fixed and recurring deposit calculators

Ideal skills and experience:
- Experience with payment gateway APIs
- Familiarity with live chat integration
- Strong background in developing financial calculators
- Proficient in backend development and database management

Please provide samples of previous related work.

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