Worked across four repositories to enhance backend reliability and operational clarity, focusing on observability and logging improvements. In across-protocol/relayer, addressed logging accuracy by refining method identification and correcting file path comments using TypeScript. Enhanced l2beat by introducing a METRIC log level with color differentiation and aligning documentation with updated logging formats. Improved shutdown observability in OffchainLabs/nitro by emitting logs on SIGINT, and stabilized error handling in message clearing routines using Go. In OpenZeppelin/openzeppelin-contracts, normalized BigInt usage in JavaScript test suites to ensure consistent and reliable assertions. The work emphasized diagnostics, test reliability, and streamlined debugging processes.