Implement me a JAX-RS REST client and map java classes

I am looking for a freelancer to implement a JAX-RS REST client and map the json to java classes with JAX-RS annotations. The ideal candidate should have experience with the JAX-RS standard and springboot.
The API to use is https://aebb.es/n5sbu
Ensure that the search parameters are mapped into class(es) and especially the results are mapped into classes
Hint: use jsonschema2pojo for reducing your time for this work
you will get existing sample code as a template of a diffferent product

Use common spring boot pattern:
- service class(es) to access API
- DTO classes

In later phase MSx this classes will be persisted into postgresql+h2

Deliveries?
- in our on premise git (access will be granted to you)
- full sources
- maven
- JDK 17
- code passes integrated PMD, findbugs and checkstyle checks

Payment?
- you estimate in a WBS after getting the task
- we discuss about clearances and effort
- we mutually agree to effort
- we assign you the task after agree
- you implement & delivery
- we pay
(basically the rules of freelancer)

Closed book vs open book?
We work only on open book.
Closed book means you are unwilling to define a WBS for the work and you add only a price tag to the task. We are sorry we will not hire you in such a case!