Heat oil and butter in a large skillet over medium heat. Add anchovies and mash until it becomes a paste. If using anchovy paste, heat throughout.
Add garlic, capers, and zest. Cook and stir constantly until the garlic is fragrant but not brown. Approximately 1 minute.
Increase to medium-high heat and add peppers and artichoke hearts. Toss often until tender. Lower heat to medium.
Add shrimp and cook 2 to 3 minutes, stirring constantly. Remove shrimp.
Deglaze skillet with white wine, scrapping all of the bits from the bottom of the pan. Allow to boil for 1 to 2 minutes.
Add spinach, pine nuts, and crushed red pepper flakes. Cook until the spinach is wilted, about 20 to 30 seconds.
Add lemon juice. Add shrimp back into the pan. Add salt, pepper, and smoked paprika to taste.
Toss to combine and servce.