Synthesize platforms are giant space-based construction yards, primarily geared to the building of superstructures too large to be launched from a planetary site.
While orbital shipyards are not uncommon, their larger cousins did not develop until the requirement to construct a neutral space station in the Kyzar system to host peace talks was established. The first platforms were constructed in the system itself, providing on-site processing and manufacturing to negate the need to transport building materials over billions of kilometres.
One of these platforms, superannuated but still capable of production, was acquired by the Hellfire pirates, who used it as both a mobile base of operations and a shipyard during their assault on Hydatus Teign.
The Reavers, while not possessing a platform per se, can amalgamate their foundry ships into a larger facility to enable construction of capital vessels.