Cook pasta in boiling water according to package directions.
Preheat oven to broiler setting (500F+) and arrange top rack so it is about 8 inches from heat source (for broiling). Heat olive oil in ovenproof skillet over medium heat and add onion and garlic cooking for about 3 minutes.
Add thawed shrimp, thyme, salt, and pepper and toss to coat in pan and place under the broiler for 3 minutes. Remove from heat and stir. Cook for additional 3 minutes or until shrimp are done. Remove from broiler.
Toss pasta into skillet and mix well until combined.