Karl Floersch is the CEO and Co-Founder of Optimism Labs, a software development company that is building the critical infrastructure to scale Ethereum's technology and values. Before joining OP Labs, Karl worked at the Ethereum Foundation as a Researcher from September 2017 to January 2020. In this role, they contributed to core research on consensus protocols and scaling, gave numerous talks, and shipped the alpha Proof of Stake (PoS) on the Ethereum test net.