Online checkout platform Bolt raised $355 million in a late-stage funding round led by fund manager BlackRock Inc at a valuation of $11 billion, according to people familiar with the matter. Other investors who participated in the series E funding round include Schonfeld, Invus Opportunities, H.I.G. Growth and CE Innovation Capital, along with existing investors Activant Capital and Moore Strategic Ventures. San Francisco-based Bolt said on Friday it intends to use the capital for product development, hire employees and expand into new international markets.