Nearly a decade after picking Cary for its technology hub, MetLife is again disclosing plans to hire hundreds of technology workers in the region. Bill Pappas, executive vice president and head of Global Technology and Operations at MetLife, said the firm is “doubling down” on hiring locally amid growing demand. He estimates the company will be adding close to 400 new jobs in areas such as software engineering, data science, cybersecurity, and customer service.