HYDERABAD: E-commerce giant Amazon has begun work on its biggest campus outside the US in Gachibowli near here and said that India continues to be one of the highest priority markets as it looks to invest with a long-term focus.Spread over nearly 10 acres, the campus will be Amazon's biggest campus in the country and as well as the largest outside US.This marks Amazon's second significant investment in Telangana in one year. Last year it had inaugurated one of its biggest fulfillment centres in the country here.Telangana Minister for IT and Panchayat Raj KT Rama Rao laid the foundation stone at the new site today.The new state-of-the-art campus is expected to be ready by 2019 and would house thousands of employees managing back-end operations for Amazon's various global business and technology teams, a release said.Welcoming this fresh investment by Amazon in Telangana, Rao said: "We are extremely happy to see Telangana as Amazon's destination of choice for their new campus. This new facility promises to add thousands of jobs and provide a fillip to the local economy."David Zapolsky, SVP and General Counsel Legal Amazon said, "Telangana has been home to our IT operations since 2005-06 and our presence in the state has grown multifold since then. For Amazon, India continues to be one of our highest priority investments and we plan to invest with a long-term focus."Amazon established its back-end operations here in 2005-06. Thousands of Amazon staff work in Hyderabad lending back-end support to not just the India business but several business and technology teams across the world.