Start by peeling and devening your shrimp if it isn't already done for you. Pat each piece completely dry with a paper towel, since excess moisture keeps the spices from sticking properly. A dry surface is really the secret to a good sear here.
In a mixing bowl, combine the paprika, garlic powder, cayenne, salt, black pepper, lime juice, and minced garlic if you're using it. Stir until you have a loose, fragrant paste. This only takes a minute but it's where all the flavor building happens.
Add your dried shrimp to the bowl and toss everything together until each piece is evenly coated. I like to let it sit for five to ten minutes at this point so the flavors have a chance to soak in a little before hitting the pan.
Set a large skillet over medium-high heat and add the avocado oil. Let the oil heat until it shimmers slightly, which usually takes about a minute. A properly hot pan is what gives you that quick, golden sear instead of soggy shrimp.
Lay the shrimp in a single layer in the hot pan, making sure not to crowd them. Cook for about two minutes per side, just until they curl up and turn opaque. Overcooking is the biggest risk here, so keep an eye on the clock.
Once the shrimp are cooked through, pour in your sriracha and toss everything together until fully coated. Let it cook for another thirty seconds so the sauce clings and slightly caramelizes onto the shrimp. Taste and add more sriracha if you want extra heat.
Pull the shrimp off the heat right away so they don't overcook from the residual pan warmth. Transfer them to a plate and serve while they're still hot and glossy. This is the moment where all that quick work really pays off.