Seeking a full-time Blockchain Engineer to work remotely in the USA, who will implement components across the on-chain transaction lifecycle and contribute to the development of institutional custody integrations and Solidity smart contracts. Key responsibilities Implement components across the on-chain transaction lifecycle, including calldata construction and finality confirmation Build new features within the institutional custody signing pipeline, focusing on asynchronous transaction handling and throughput management Extend existing Solidity smart contracts and contribute to custody authorization policy integrations Required qualifications 3-5 years of professional backend software engineering experience 1-2 years of hands-on experience with EVM-compatible blockchain systems Strong proficiency in TypeScript Production experience developing or maintaining Solidity smart contracts Understanding of asynchronous system concepts such as idempotency and retries