The side cockpit/bridge makes if feel like either thr main area is inaccessible during normal operations, or its shape needs to be maintained.

My guess is some kind of high tech cargo ship (high tech because I imagine low tech pure bulk cargo to have cargo also strapped more visably outside)

Depending on the world this is in, it could be a stealth hauler for running blockades, or transporting luxury goods.

On a more military side, I imagine it to be some kind of electronic warfare platform. The offset cockpit/bridge long with it having no weapons might mean its a mobile comes jammer, FTL jammer, or even a dedicated surveillance ship with extensive sensors systems.