Spring+boot+data - query by Example having association return Page

I have an Employee entity class with Job entity mapped. In a controller I want to return all employees who have the job with the given Job description. How i do it? Currently my code returns empty list.

here is my code

public class Employee {
  public int id;
  public String name;

  @ManyToOne()
  @JoinColumn(name="JOB_ID", referencedColumnName="JOB_ID")
  public Job job;
  ...
}
public class Job {
  public int jobId;
  public String desc; // job description
  ...
}

@Controller
public MyController {
  // I want to filter employees when given Job desc property

  @RequestMapping("/filter")
    public ModelAndView filterBy(
        @ModelAttribute("emp") Employee emp, 
    Pageable pageable, ModelMap model) {

        ExampleMatcher matcher = ExampleMatcher.matching()
                .withMatcher("name", match -> match.startsWith().ignoreCase());

        Example<Employee> example = Example.of(emp, matcher);
        Page<Employee> employeePage = employeeRepository.findAll(emp, 
                new PageRequest(pageable.getPageNumber(), 
                pageable.getPageSize(), null));

        PageWrapper<Employee> page = new PageWrapper<Employee>(employeePage, "/employee");

        model.addAttribute("employee", empPage.getContent());
        model.addAttribute("page", page);

        return new ModelAndView("employeePage", model);
    }
}

Thanks for your suggestions.

I have resolved the issue. The query by example worked fine it was just one the entity properties was could not be null so I had to add to ignore it.

.withIgnorePaths("job.property") <-- ignore property which is not null