Cut the chicken thighs into bite-sized pieces.
In a bowl, combine the cornstarch and chicken, coating well.
Heat the vegetable oil in a large skillet over medium-high heat.
Add the chicken pieces to the skillet and cook until golden brown.
In a separate bowl, mix the sweet chili sauce, soy sauce, rice vinegar, sriracha, garlic, and ginger.
Pour the sauce mixture over the cooked chicken in the skillet.
Stir well to coat the chicken evenly with the sauce.
Let it simmer for 5 minutes.
Remove from heat and garnish with green onions and cilantro.
Serve hot with rice or noodles.