Pat shrimp dry with paper towels and season lightly with salt and pepper.
Heat olive oil in a large skillet over medium-high heat.
Add shrimp and cook for 1-2 minutes per side, until pink and opaque. Remove and set aside.
Reduce heat to medium and melt butter in the same skillet.
Add garlic and red pepper flakes, sauté for 30 seconds until fragrant.
Stir in soy sauce, oyster sauce, and lemon juice.
Place bok choy halves cut-side down in the skillet and cook for 2-3 minutes until tender-crisp.
Return shrimp to the skillet, toss to coat in the sauce, and heat through for 1 minute.
Serve immediately, garnished with fresh parsley or cilantro.