The company is hiring to run the 100 logistics facilities it will launch this month in the United States, on top of the more than 250 that opened earlier this year. The additional staffing will also help roll out one-day delivery for Amazon"s Prime loyalty club members. Retailers are scrambling to hire hourly workers in a tight-labor market and have been offering benefits and sign-on bonuses to entice them. Walmart Inc (WMT.N) said earlier this month said it planned to hire 20,000 workers at its supply chain division ahead of the busy holiday season.