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 completely dry with a paper towel to ensure a good sear.
In a large skillet over medium heat, add the olive oil and grass-fed butter until the butter is melted and bubbling.
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 the heat to medium-high and add the shrimp in a single layer, seasoning them with sea salt and black pepper.
Cook the shrimp for 1-2 minutes per side until they turn pink and opaque, then remove them from the skillet and set aside on a plate.
Pour the white wine and lemon juice into the same skillet, using a wooden spoon to scrape up any browned bits from the bottom.
Allow the liquid to simmer and reduce by half, creating a concentrated, silky sauce.
Drain the linguine, reserving a splash of pasta water, and add the noodles directly into the skillet with the sauce.
Return the shrimp to the pan, add the fresh chopped parsley, and toss everything together until the pasta is well-coated, adding a touch of pasta water if needed.