Cook the pasta in a pot of boiling lightly salted water and cook for 6-8 minutes or until the pasta is just tender. Drain pasta and set aside.

In a large non stick pan, melt 2 tablespoons butter in 2 tablespoons olive oil over medium high heat. Cook the shallots, garlic, and red pepper flakes, if using, until the shallots are translucent, about 3 to 4 minutes. Season the shrimp with salt and pepper; add them to the pan and cook until they have turned pink, about 2 to 3 minutes. Remove the shrimp from the pan, set aside and keep warm.

Add the wine and lemon juice to the same pan and bring to a boil. Add 2 tablespoons butter and 2 tablespoons olive oil. When the butter has melted, return the shrimp to the pan along with the parsley and cooked pasta. Stir well and season with salt and pepper to taste. Drizzle over a bit more olive oil and serve immediately.