In a small bowl, combine the smoked paprika, garlic powder, salt, and pepper. Season both sides of the chicken breast with the spices.
Heat a skillet over medium. Add the cooking oil and swirl to coat the surface of the skillet. Add the seasoned chicken breast and cook for about 5-7 minutes on each side, or until cooked through (internal temperature of 165ºF). Transfer the chicken to a clean cutting board.
Let the chicken rest for about 5 minutes, then chop into small pieces. Add ¼ cup BBQ sauce to the chopped chicken, and stir to coat the chicken in the sauce.
Preheat the oven to 450ºF. Place the prepared pizza dough or crust on a pizza pan, then spread about ½ cup BBQ sauce over the surface.
Add the cheese, BBQ chicken, sliced jalapeños, and sliced onion to the pizza.
Bake the pizza for 10-12 minutes, or until the crust and cheese are golden brown. Slice into 8 pieces and serve.