Hi,
Greetings. I can see you need a high quality production level code. With this proposal, you're looking at someone who has experience working with core product of country's biggest Fin-Tech software. Most of the work included writing secure, well designed and standardized Restful APIs. Along with that, I've worked upon creating custom softwares that run full fledged businesses.
Tech stack that we'll be using will include Spring framework and ORM like Hibernate or Spring Data JPA for interaction with DB. All the points provided will be well taken care of. APIs will return JSON format response with proper standards. API endpoints will be using security measures like access based control. For proper visualization of APIs, swagger can also be configured with the project. Logging will be well taken care of.
For further needs, we can have a discussion and close the requirement.
Regards
Durlabh Sharma