In a large wok or skillet over medium heat, add the oil, shrimp, garlic, ginger, and shallot. Sauté for 3-4 minutes.
Add in 2 tablespoons of butter and the brown sugar. Stir until combined. Add the sriracha, soy sauce, and chili peppers. Let simmer, stirring frequently, for 2-3 minutes.
Add the last two tablespoons of butter and stir until it is melted and incorporated.
Top with lots of freshly chopped scallions. Serve hot.