If I had social phobia I wouldn't be able to reply to this post. If I couldn't work I wouldn't be a doctor.
I do have some suggestions for you. Just get a job that keeps human contact to a minimum. For example, you might become a professional diver, allowing you to spend all your time at the bottom of the sea, or you could become an arctic solo explorer. For best results, be abrasively rude to anyone you might have to interact with, so that they leave you alone and thus don't trigger your social anxiety. For example, here is a good line you can use, "I assume you wouldn't be able to work with a good quickie. Come to my house, I'll show ya how to be less sociophobic."
I also consulted my grandmother, who happens to have social phobia. Here is her response, "OF COURSE I HAVE SOCIAL PHOBIA...SPECIFICALLY AROUND YOU AND YOU ALONE. WHENEVER YOU DECIDE TO PLAGUE US WITH YOUR PRESENCE, I’M NERVOUS TO MAKE ANY JOKES BECAUSE I KNOW YOU’LL TRY TO MAKE A LAME FOLLOW UP JOKE THAT BRINGS THE LAUGHING TO A HALT. I CAN’T WORK ON ANY CONVOLUTED PLAN BECAUSE YOU’LL COME BREATHING DOWN MY ******* NECK WITH A SMELL THAT IMPLIES YOU JUST RETURNED FROM YOUR DAILY TRIP TO THE USED CIGARETTE STORE AND OF COURSE YOU HAVE TO ASK “whatcha working on there, buddy ol pal?”! WELL YOU KNOW WHAT, I’M SICK OF IT! THE ONLY WAY MY PHOBIA COULD BE CURED IS IF YOU’RE WIPED OFF THE FACE OF THIS GIANT DIRT BALL! THAT’S RIGHT, I KNOW WHERE YOU ARE, JIM! HIDE YOUR KIDS, HIDE YOUR BODY PILLOW COLLECTION!"