1. Start by patting the scallops dry with paper towels. Removing excess moisture is key to achieving a perfect sear.
2. In a small bowl, mix together the Cajun seasoning, garlic powder, smoked paprika, salt, and pepper.
3. Sprinkle the spice mixture evenly over both sides of the scallops.
4. Heat olive oil in a large skillet over medium-high heat. Once the oil is shimmering, add the scallops in a single layer, making sure not to overcrowd the pan.
5. Let the scallops sear without moving them for about 2-3 minutes, or until a golden crust forms.
6. Flip the scallops and add the butter to the pan. Cook for an additional 2 minutes, basting the scallops with the melted butter, until they are opaque and cooked through.
7. Remove from heat and serve immediately with lemon wedges on the side.

Remember that the key to perfectly seared scallops is to ensure they are dry and the pan is hot. This creates that beautiful crust that makes them so irresistible.