Place the eggs in a pot and cover them with cold water. Bring the water to a boil, then lower the heat and let them simmer for about 10 minutes. Move the eggs to an ice bath so they cool quickly and peel more easily.
While the eggs cool, warm the olive oil in a skillet over medium heat. Toss the shrimp with smoked paprika, a pinch of Cajun seasoning, salt, and pepper, then cook for 1 to 2 minutes per side until pink and just cooked through. Set aside to cool, then chop them into small pieces if needed.
Peel the eggs and slice them in half lengthwise. Gently remove the yolks and place them in a bowl. Mash the yolks with mayonnaise, Dijon mustard, lemon juice, garlic powder, paprika, Cajun seasoning, salt, and pepper until smooth and creamy.
Spoon or pipe the filling back into the egg white halves. Keep the filling mounded slightly so the eggs look neat and full.
Top each deviled egg with a small piece of shrimp and finish with parsley and a light dusting of paprika. Chill until ready to serve, or enjoy right away.