01 - Soak wooden skewers in water for at least 20 minutes if using to prevent burning.
02 - Whisk together olive oil, garlic, smoked paprika, cumin, coriander, cayenne, salt, pepper, lemon juice, and lemon zest in a bowl.
03 - Add shrimp to the marinade, toss to coat thoroughly, and let sit for 10-15 minutes at room temperature.
04 - Thread shrimp onto skewers, piercing through both the head and tail ends to form a C shape.
05 - Preheat grill or grill pan to medium-high heat.
06 - Grill shrimp skewers for 2-3 minutes per side until opaque and lightly charred.
07 - Remove from grill, squeeze fresh lemon juice over top, sprinkle with chopped parsley if desired, and serve immediately with lemon wedges.