Worked on improving the correctness and maintainability of zero-knowledge proof verification across the risc0/risc0-ethereum and risc0/risc0 repositories, focusing on Groth16 verifier alignment with snarkjs. Addressed input validation issues in Solidity smart contracts by refining public signal checks, ensuring compatibility and preventing memory access errors. In the hyperledger/besu repository, refactored Java code to standardize error handling by replacing magic numbers with predefined constants, reducing risk and improving code consistency. Leveraged expertise in Solidity, Java, and zero-knowledge proofs to deliver targeted bug fixes, prioritizing interoperability and robust input handling over new feature development during this period.