1. In a medium bowl, combine mango, red onion, jalapeño, cilantro, lime juice, salt, chili powder, and Tajín. Stir well and adjust seasoning to taste. Chill in the refrigerator while preparing the shrimp.
2. In a small bowl, combine chili powder, cumin, salt, smoked paprika, garlic powder, and black pepper. Pat the shrimp dry with a paper towel, then place in a large bowl. Drizzle with olive oil and toss with the spice mix until well coated.
3. Heat a bit of olive oil in a large sauté pan over medium-high heat. Cook shrimp in a single layer for 2–3 minutes per side until opaque and cooked through. Do this in batches if needed. Remove from heat.
4. In each bowl, add a scoop of rice, then top with shrimp and mango salsa. Squeeze fresh lime over the top and garnish with cilantro. Serve and enjoy!