Toss the shrimp with the minced garlic, paprika, cayenne, and a generous pinch of salt and pepper.
Heat a large skillet over medium high heat and add the butter. Once melted and bubbling, add the shrimp to the pan. Cook about 2 minutes per side or until pink and cooked through.
Drain out any liquid from the skillet, then add in the pineapple and lemon juice. Toss to combine and warm up the pineapple. Taste and add more salt if needed.