The Eastern (or Humped) Golden Orb Weaver is similar to the Australian Golden Silk Orb Weaver, N. edulis
(see link) but was in an open area of a Sydney Park rather than forest and has banded legs. Some have darker bodies.
They can have an off-white, greyish or plum coloured body but with yellow banded legs.
Males are tiny (up to 6mm) compared to the females (more than 2cm head/body) and often live on the edges of a female's web
waiting a chance to mate, as shown. The larder line of silk-wrapped prey is also shown.