Physics constrains jump height to be about a few meters regardless of size. The basic problem is that the total energy required scales with mass, but the total energy available also scales with mass. The two end up cancelling out and you get a maximum jump height that is independent of size.

What really matters is the energy density of your storage medium, which is the same to an order of magnitude for any system based on chemical energy. So both a flea and an elephant (along with battery-powered robots) can jump about a meter or two in height.