01 - In a medium bowl, toss the shrimp with 1 tablespoon olive oil, 1/2 teaspoon kosher salt, and 1/4 teaspoon black pepper. Set aside while preparing the sauce.
02 - Combine parsley, cilantro, garlic, 1/3 cup olive oil, red wine vinegar, oregano, red pepper flakes (if using), 1/2 teaspoon salt, and 1/4 teaspoon pepper in a separate bowl. Stir thoroughly and let sit for 10 minutes to meld flavors.
03 - Heat a large skillet over medium-high heat until hot. Add shrimp in a single layer, working in batches if necessary to avoid overcrowding. Sear for 2-3 minutes per side until opaque and lightly golden.
04 - Transfer cooked shrimp to a serving bowl. Immediately toss with half of the chimichurri sauce while hot to coat evenly.
05 - Serve warm, drizzled with remaining chimichurri sauce. Accompany with lemon wedges if desired.