No. The conditions of the J-1 intern/trainee visa strictly prohibited you from accepting any employment in the U.S not described in your raining/internship T/IPP, and/or performing any work in the U.S. If you engage in unauthorized employment and/or work, you will be in violation of program regulations, and subject to immediate program termination. There is a chance that you may face deportation and/or other penalties through the United States Citizenship and Immigration Services (USCIS).