Worked on the pyth-network/pyth-crosschain repository to deliver robust cross-chain price feed infrastructure over four months, implementing 53 features and resolving 23 bugs. Focused on secure Wormhole-based propagation, the work included Solidity and Rust smart contract development, cross-chain data parsing, and integration with Fuel and TON blockchains. Enhanced reliability through rigorous test coverage, fee validation, and error handling, while aligning toolchains and optimizing ABI definitions. Refactored core verification paths and initialization flows, expanded governance and fee management logic, and improved maintainability with code cleanup and documentation. The approach emphasized safe, maintainable, and scalable cross-chain data delivery and contract workflows.