Multiplex Systems Private Limited | 188 followers on LinkedIn. Multiplex Systems Private Limited, with its offshore centre located in New Delhi, is a diversified software outsourcing company that gives technology solutions to business enterprises around the world. Multiplex specializes in developing applications using both the Internet and desktop technologies. The company has proven expertise in delivering low cost, but high quality and reliable software solutions and services in areas such as travel, sports, e-commerce, social media, entertainment, publishing, manufacturing, e-learning, finance and many other business systems.