Bring a large pot of salted water to a boil and cook the linguine according to package directions until al dente.
While the pasta cooks, peel and devein the shrimp, then pat them dry with a paper towel to ensure a good sear.
In a large skillet over medium heat, add the olive oil and ghee until shimmering and melted.
Add the minced garlic and red pepper flakes to the skillet, sautéing for about 1 minute until the garlic is fragrant but not browned.
Increase heat to medium-high and add the shrimp in a single layer, seasoning with sea salt and black pepper.
Cook the shrimp for 2 minutes per side until they turn pink and opaque, then stir in the lemon juice.
Reserve 1/4 cup of the pasta water, then drain the linguine and add it directly to the skillet with the shrimp.
Toss everything together, adding a splash of the reserved pasta water if needed to create a glossy sauce.
Remove from heat, garnish with freshly chopped parsley, and serve immediately.