A worker of Indian e-commerce company Snapdeal.com scans barcode on a box after it was packed at the company's warehouse in New Delhi April 20, 2015. After losing top engineering talent for years to America's tech heartland of Silicon Valley, India is luring them back as an e-commerce boom sparks a thriving start-up culture, unprecedented pay, and perks including free healthcare for in-laws. Picture taken April 20, 2015. To match INDIA-ECOMMERCE/WORKERS. REUTERS/Anindito Mukherjee