Pat the shrimp dry with paper towels and season lightly with salt and pepper.
Heat olive oil and butter in a large skillet over medium heat until melted and hot.
Add garlic and sauté for about 1 minute until fragrant, but not browned.
Toss in the shrimp and cook for 2 to 3 minutes per side until pink and opaque.
Sprinkle Parmesan over the shrimp, stirring gently until melted into the sauce.
Add lemon juice and red pepper flakes, giving everything a quick toss.
Remove from heat and finish with fresh parsley before serving.