Bring a large pot of water to a boil, salt it, add the pasta and cook until al dente. Drain, reserving 1 cup of the pasta cooking water.
While the pasta is working, in a large skillet, heat the EVOO, 3 turns of the pan, over medium heat. Add the shallots, celery, chile, garlic, thyme, paprika, salt and pepper. Cook until the veggies are tender, 5 minutes. Add the parsley, hot sauce and lemon zest. Stir in the vermouth and cook to reduce for 1 minute. Add the lemon juice. Stir in the butter to melt. Add the crabmeat and heat through.
Toss the pasta with the crab and reserved pasta cooking water. Top with the scallions.