As a full-stack developer with extensive experience in various technologies including the Quarkus framework, Java, and MySQL, I am confident that I can help you refine and optimize your Quarkus Web App backend to deliver a better user experience. I have a meticulous approach to code organization and architecture and will ensure that all the classes in your app are sorted into their respective folders like controllers, services, etc., as per your requirement. Further, I'm well-versed in reactive coding which is mandatory for your project.
I have proficiency in API integration and database management which means that I will be able to help you resolve the issues related to handling API responses and implementing database transactions. My experience with implementing parallel processing of batch jobs makes me apt to address your concern about batch execution. Additionally, employing my attention-to-detail, I will meticulously audit your implementation against Open API spec for any deviation from expected responses.