Our flagship project BOB ("Build on Bitcoin") is a first-of-its-kind hybrid Layer-2 powered by Bitcoin and Ethereum. By combining the security, liquidity, userbase, and innovation of the two largest blockchain ecosystems, BOB closes the gap between Bitcoin as a vehicle for mass adoption and Ethereum as a hub for innovation. This is achieved through BOB's rollup ecosystem that uses Bitcoin for settlement, storage, and security while enabling users to access all the on and off-ramps, dapps, stablecoins, NFTs, DeFi, etc. made possible by Ethereum's EVM. 


George Town, Cayman Islands

Build on Bitcoin

They are a venture capital firm focused exclusively on public blockchains. They invest in infrastructure and application companies that will enable these transformative protocols to power services for the next billion users.

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As our companies grow, they look to us to help them find the best talent.
Signal that you'd be interested in working with a Castle Island Ventures company to help us put the right opportunities at great companies on your radar. The choice to pursue a new career move is then up to you.