develop own payment gateway with unique address for the users and able to integrate to other platform

I am looking for a skilled developer to help me create my own payment gateway with a unique address for users. The gateway should be able to integrate with other platforms seamlessly.

Preferred Programming Language:
- Python

Platform Integration:
- The payment gateway should be compatible with all platforms.

Budget:
- My budget for developing the payment gateway is $500.

Ideal Skills and Experience:
- Proficient in Python programming language
- Experience in developing payment gateways
- Knowledge of integrating payment gateways with different platforms