A technological Alchemist or Gunslinger sounds appropriate. Maybe an Alchemist or Investigator is looking for ways to incorporate medical nanotechnology into their potions.
Another idea that might be fun - A Wizard or Arcanist that believes that their magic is just technology or scientific processes that haven't been fully explained yet, and looks down on spellcasters who engage in "magical thinking". Could possibly work with a Sorcerer, too, if the character believed that the source of their Sorcerer spells was irradiation or mutation by hyper-technology (or maybe they got some nanites in their blood which has given them their "bloodline"), and was looking for more tech in order to grow their power.
Another random idea - A Witch who believes that their patron is a visiting alien who has taken the form of or is remotely controlling their familiar, granting the Witch the use of alien technology that looks like spells. This idea could work with a Cleric or Oracle too, I suppose, if the character believed that gods are actually visiting benevolent aliens.