Make shrimp: in a large bowl, toss shrimp with cumin, paprika, garlic powder, onion powder, and season with salt and pepper. In a large skillet over medium-high heat, heat 1 tbsp olive oil. Add shrimp and cook until opaque and charred.
Make corn salad: in a medium bowl combine corn, pepper, and cilantro. Add 1 tbsp olive oil, juice of half a lime, and season with salt and pepper.
Build bowls: divide rice between 4 bowls. Top with shrimp, corn salad, and 1/4 avocado each. Garnish with cilantro, squeeze with lime and serve.