Place the rice noodles in boiling water and let soak according to package directions.
Mix the soy sauce, oyster sauce, lemongrass paste, gochujang, ginger , brown sugar, cornstarch and garlic together in a bowl and set aside.
Add the oil to a wok or large skillet. Add the chicken and mushrooms. Stir fry until chicken is done. Add the carrots and green onions. Add the sauce mixture and bring to a boil and let thickened a bit. Stir in the noodles. Add the lime juice Top with the cilantro