Ethereum Payment Gateway & Transaction Monitor

I need a seasoned Node.js developer to create a standalone, Ethereum-based cryptocurrency gateway server for me. This server should have the following capabilities:

- Payment Processing: The server should efficiently handle Ethereum transactions, providing seamless payment processing.

- Transaction Monitoring: I want the ability to track transactions in real-time, ensuring transparency and security.

Ideal candidates for this project should have extensive experience with Node.js and a solid understanding of Ethereum and its transaction mechanisms. Prior work on creating cryptocurrency payment gateways will be highly regarded. Please provide examples of similar projects you have completed in your proposal.