I would vote Hephaestus. Aside from what is mentioned in the post, Hephaestus [is supposed to have] created Talos. Talos was a humanoid perimeter patrol robot with offences capabilities. Maybe that makes him more Tony Stark than god of programming?
In doing this work, Hephaestus is aided by some amphipoloi created by him (Greek amphipoloi = Latin ancillae, which means female servants), which were made of metal and which were sentient and followed exactly the commands of Hephaestus.
AFAIK, this Iliad fragment is the earliest description of robots that is known.