Custom Payment Gateway Development

I'm in need of an experienced tech professional to set up and develop our own payment gateway. This project involves creating the accompanying API using Node.js/Express.

Key Requirements:
- Extensive understanding and experience with payment gateway development.
- Proficient in Node.js and Express framework.
- Able to develop a secure and efficient payment gateway with essential features.

Ideal Skills:
- API Development
- Node.js/Express
- Payment Gateway Experience
- Security and Fraud Prevention Knowledge
- Multi-Currency Support Understanding

Please provide examples of previous relevant work when bidding.