Cook the pasta in salted boiling water according to package instructions until al dente. Drain and set aside.
Season the shrimp with Cajun seasoning. Heat a skillet over medium-high heat, add butter, and sear the shrimp for 1-2 minutes per side until golden. Remove and set aside.
In the same skillet, add olive oil and garlic. Sauté for 30 seconds until fragrant.
Pour in heavy cream and chicken broth, stirring to combine. Let simmer for 3-4 minutes until slightly thickened.
Stir in Parmesan cheese and mix until melted and smooth.
Add the cooked pasta and shrimp to the sauce, tossing until evenly coated.
Serve hot, garnished with fresh parsley and an extra sprinkle of Parmesan.