Unpopular opinion here but where they are posting and how they are posting appear to be completely relevant and on topic. The topics are each services looking for someone  - John applies leaves their deets and moves onto applying for the next position. He isn't exactly advertising a service he is applying, in a somewhat annoying manner. It really reminds me of years ago when I was on the job search hard. I was sending out 3 or 4 resumes a week with a few words changed in my cover letter catering to each company.

If these were discussion threads that he was dropping in on and posting similar to this with only a small change to promote himself then that would fit the spam and off-topic rules I believe.
Whether or not they actually make the qualifications for the job is up to whoever hires them really. I would say that they could also be in the Netherlands and be native to a foreign country if they relocated internationally. Again could just be applying for jobs they are underqualified for, which also has no bearing on forum rules.

They should create a Services[ANN] thread for them selves and just reference it when applying for any position.