|Dox of the ParaDox twins|
Are you designing him as a PC or as a NPC companion?
As a NPC companion, it be easier. He's an awakened clockwork servant with the robot subtype.
Give him alchemist levels due to his bombs. Replace net and give him 2 slam attacks. Reflavor extracts and alchemist discoveries as techs.
Recommend bomb discoveries (healing bomb, rocket bomb, reflavor scrap bomb as bludgeoning damage and replace bleed with knockback 5 ft with Ref to resist knockback. The reflavored scrap bomb is now rocket punch.)
If you plan to play him as a PC race, look at the SRO from starfinder. Convert that to Pathfinder. Take two levels of brawler and the rest in alchemist.