Freelance exchange on the principle of "the contractor offers, the customer chooses from the ready"?

Question

Freelance

Good afternoon. There is a site https://kwork.ru/search?query=bitrix , where performers post what they can do specifically (for example, installing some kind of script on bitrix), and the customer chooses what he needs / likes from all the offers. Are there other more popular sites that work on this principle?

Answer 1

https://freelance.habr.com/services
and any others have similar sections.

Answer 2

As far as I understand, any exchange has a catalog of freelancers, they can be viewed and selected. How much customers use it is a question.

Answer 3

Quark is the top and gobbled up almost the entire freelancer market in the IT field