As Ethereum's Layer-2 ecosystem booms, Caldera's "Metalayer" aims to help developers quickly launch applications across multiple networks. : Caldera, a "rollup-as-a-service" platform that helps developers quickly spin up layer-2 blockchains, has closed a $15 million Series A funding round led by Peter Thiel's Founders Fund. CEO Matt Katz said in an interview with CoinDesk that the new funds will help him expand Caldera's 15-person team so they can build out the Metalayer, an interoperability ecosystem meant to simplify the process of launching applications across multiple blockchains.