In a bowl, combine olive oil, chili powder, cumin, garlic powder, salt, and pepper.
Add the shrimp to the bowl and toss to coat evenly.
Heat a large skillet over medium-high heat and add the seasoned shrimp.
Cook the shrimp for about 2-3 minutes until they turn pink and opaque.
Remove the shrimp from the skillet and set aside.
In the same skillet, add the sliced bell peppers and onions.
Sauté the vegetables for 3-4 minutes until they are tender-crisp.
Return the shrimp to the skillet with the vegetables and mix well.
Cook for an additional 2 minutes to combine flavors.
Serve the shrimp and vegetable mixture in warm tortillas.