Olivier van den Biggelaar is Ethereum Engineer (R&D), zk-Snarking at Argent. Interested in Longevity Tech, the Neuroscience of Intelligence, and all things Ancapistan. - Design and implementation of Hopper, a protocol enabling private and trustless Ethereum transactions using Zero-Knowledge Proofs (zk-SNARKS). - Design and implementation of a Metamask fork allowing smart wallets to interact with Dapps via gas-less relayed meta-transactions. - Development, testing and security analysis of the smart contracts powering Argent's wallets and wallet creation infrastructure. Tech: Solidity, Javascript, C++, Swift, Python, libsnark, Zokrates.