John Callaghan Email & Phone Number

John Callaghan, based in San Francisco, California, United States, is currently a Senior Software Engineer at Sigray, Inc., bringing experience from previous roles at Napa Software Development, QT Ultrasound, Raydiance, Inc. and Positronics Inc.. John Callaghan holds a 1986 - 1987 Columbia University in the City of New York. With a robust skill set that includes Software Development, C++, C#, Device Drivers, Embedded Systems and more, John Callaghan contributes valuable insights to the industry. John Callaghan has 2 emails and 1 mobile phone number on RocketReach.