Bring a large pot of salted water to a boil and cook the linguine until al dente, reserving 2 tablespoons of pasta water before draining.
Pat the shrimp completely dry with paper towels and season evenly with sea salt and black pepper.
In a large skillet, heat the olive oil and ghee over medium-high heat until the fat is shimmering and hot.
Add the shrimp to the skillet in a single layer, searing for 1-2 minutes per side until they turn pink and opaque.
Remove the shrimp from the pan and set aside on a plate, then reduce the skillet heat to medium.
Add the minced garlic and red pepper flakes to the remaining fat in the pan, sautéing for 30 seconds until fragrant.
Whisk in the lemon juice and lemon zest, then return the cooked shrimp and linguine to the skillet.
Toss all ingredients together thoroughly, adding the reserved pasta water if needed to create a glossy, emulsified sauce.
Garnish with freshly chopped parsley and serve immediately.