React,Node, Javascript senior developer (immediately hiring)

Hello.. No agencies, please. I do not hire through agencies. My website, RoboComposer, is a dot com website that uses algorithms to compose music. I am looking for one or two programmers to help me make some improvements, especially to the COMPOSE page of my website. My website uses React and D3. If you have those skills that is helpful. The ideal person will be able to do some work on a daily basis, perhaps a few hours each day. HOW I PREFER WE WORK As this is a bedroom start-up company that is self-funded, I am limited in the hourly rate I am able to afford, and therefore I am seeking the best possible hourly rates. For the same reason, I must avoid hours being billed with little or no work being accomplished. In the past, I hired some developers who began billing hours, but after many hours had been billed, did not have any tangible results to show. From this experience I learned to break development up into small deliverables that can be done in a few hours, and bill all work on a milestone basis.