If frozen, defrost shrimp by placing in a collander and running under cold water.
Skewer shrimp onto skewers so they are nestled together. Set aside.
Combine 1 teaspoon sea salt, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/2 teaspoon black pepper, 1/2 teaspoon chili powder, 1/2 teaspoon granulated sugar, and 1/4 teaspoon cayenne pepper in a small bowl.
Mix until combined.
Brush lemon juice on both sides of skewered shrimp and then top with the melted butter.
Sprinkle a liberal amount of the seasoning mixture over the shrimp.
Place the shrimp (seasoning side down) on a hot grill.
Sprinkle the shrimp with the remaining seasoning.
Grill for 3-4 minutes and flip.
Cook an additional 3-4 minutes, until shrimp is opaque and tails are pulling toward the body.
To make the remoulade sauce, combine all of the remaining ingredients in a medium bowl.
Serve and enjoy!