ISO 20022 Callback Endpoint Implementation (acmt.023 / acmt.024)

I need an experienced developer to implement one specific ISO 20022 message flow — acmt.023 (Name Enquiry) and its acmt.024 response — as a standalone, working callback endpoint, deploy it to our server, and demonstrate a valid response from the payment scheme's system... (Budget: $30 - $250 USD, Jobs: Java Spring, XML)