Readymade Cross-Platform Payment Gateway Integration

I'm looking for a ready-made payment gateway system that can be integrated into both web and mobile platforms. The gateway should support multiple payment methods, including credit/debit cards, bank transfers, and digital wallets. Additionally, it must have the capability to handle multiple currencies.

Key requirements:
- Support for both web and mobile platforms
- Integration with credit/debit cards, bank transfers, and digital wallets
- Multi-currency support is essential

Ideal skills and experience:
- Experience in integrating payment gateways
- Familiarity with multi-currency transactions
- Knowledge of both web and mobile payment systems
- Strong background in financial security and compliance