Worked on the Consensys/linea-monorepo repository to deliver a performance enhancement for the Poseidon2 hashing algorithm, focusing on optimizing gas efficiency for on-chain cryptographic operations. The approach involved introducing lazy reductions to minimize the number of addmod operations and merging the sbox and addroundkey steps to streamline the hashing pipeline, thereby reducing computational overhead. All changes were consolidated in a single commit to support future maintainability and traceability. The work was implemented using Solidity and leveraged expertise in cryptography and smart contract development, with an emphasis on code refactoring, performance tuning, and improving overall testability and maintainability.