01 - In a large bowl, whisk together olive oil, Cajun seasoning, smoked paprika, garlic powder, onion powder, cayenne pepper (if using), salt, black pepper, and lemon juice until fully incorporated.
02 - Add the shrimp to the bowl and toss until thoroughly coated with the seasoning mixture. Let sit at room temperature for 10–15 minutes to absorb flavors.
03 - Preheat grill or grill pan to medium-high heat. If using wooden skewers, soak in water for 20 minutes before threading.
04 - Thread the marinated shrimp onto skewers, leaving slight space between pieces for even cooking.
05 - Grill shrimp for 2–3 minutes per side until pink and opaque with light char marks. Avoid overcooking to maintain tenderness.
06 - Remove from grill and transfer to a serving platter. Sprinkle with fresh parsley and arrange lemon wedges alongside.