Thanks for the feedback! It sounds like you'd be looking for platform engineering leads. I completely agree on the categorisation and will be looking to add more specific professions soon.

With the platforms, again I agree with you that the way some of them are designed makes it difficult for freelancers to be valued for the work they create. That's why we not only find leads from these platforms but also seek to find leads from sources such as LinkedIn/Facebook where you can have a much more direct relationship with the individual looking for your skillset.