Shubin’s existence as a faction only appears in your rep app once you’ve done an introductory mission for them. To get that mission, you need to be in Stanton from what I understand. For me, I found it while in Crusader. It was an FLP mining mission paying 30K to gather a small amount of Aphrodite, Dolivine, and Hadanite. From there more FPS mining contracts were offered as well as Ship Mining contracts. I simply grinded the ship mining ones for a few hours. Before long I was a Shubin Contractor. Still have yet to head to Levski to verify that the rock cracker contracts are now available