Stephen A Costales

Stephen A Costales is a seasoned engineering professional with extensive experience in software development and quality assurance. Currently serving as a Principal Systems Engineer at AT&T since August 2015, Stephen specializes in software development within the Entertainment Group, focusing on integration products for Amazon Alexa, including end-to-end testing and production support. Previously, as a Staff Engineer at DIRECTV, Stephen led projects related to program guide authorization and contributed to various services in production. Prior experience includes working as a Quality Assurance Test Engineer at Extron Electronics, where responsibilities involved system integration testing and verification. Stephen holds a Bachelor's Degree in Electrical and Electronics Engineering from California State Polytechnic University-Pomona.