Whisk together the brown sugar, orange juice, hot sauce, rice vinegar, red pepper flakes and ½ teaspoon salt in a medium bowl; set aside.
Dry the shrimp well with paper towels and add to a large bowl. Sprinkle the cornstarch over the shrimp and toss to coat.
Heat the oil in a large nonstick skillet over medium-high heat until shimmering. Fry the shrimp in the hot oil until pink, about 1 minute per side. Add the ginger and garlic. Cook, stirring, until fragrant, about 1 minute. Add the sauce mixture, rice and scallions and cook until warmed through, about 3 minutes.
Top with more red pepper flakes, a drizzle of sriracha and cilantro leaves.
