Combine all the ingredients for the rub. Use 4 teaspoons of rub to season the shrimp. Cover and set aside. Store leftover rub in an airtight container. Use to season other seafood dishes.
Heat a large skillet over medium high heat, add olive oil and shrimp to the skillet. Cook for 2-3 minutes until fully cooked. Remove from heat.
Assemble the tacos by adding 4-5 shrimp to the warm tortillas. Top with shredded cabbage, pico de gallo, serrano peppers. Drizzle chipotle sauce over the tacos. Serve immediately.