Hi ,
I have read your project and I have worked on couple of financial based projects . I have 5 years of experience in java, spring , hibernate , sql , devops , aws
I had worked on BITCOIN, ETH etc coins to implement blockchain for sending , receiving and exchange of coins.
I have 4 years experience of working on payment gateway back end project. Currently working on 3 payment gateways back end systems and merchant payment gateway integration.