Is it permissible, from an Islamic perspective, to engage in what is known as "Drop Servicing," which relies on creating a platform to receive services at a specified price, then requesting these services from freelancers at a lower price to profit from the difference?

If the client does not stipulate that the worker must perform the work himself, then there is no harm in him doing it in the manner mentioned, as long as he delivers the work to the client as required. Indeed, it is permissible for a worker hired for a specific task (ajīr fī al-dhimmah) to hire someone else to perform the work.