Federico Alconada worked on the matter-labs/zksync-era repository, delivering a deployment allowlist optimization for nested smart contract deployments. He implemented an API-level solution in Rust that enables multi-contract deployments within a single transaction when the initiator is on the allowlist, removing the need for per-contract allowlisting. This backend development effort reduced deployment friction and on-chain overhead, streamlining the process for complex contract systems. Federico’s work focused on deployment orchestration and API behavior, ensuring traceable change management. The feature improved scalability and developer experience by simplifying nested deployments, demonstrating a strong grasp of smart contracts and backend systems integration.