Worked on enhancing backend reliability and connectivity across two open source projects over a two-month period. In the trpc/trpc repository, refactored WebSocket handling in both the Fastify adapter and the core WebSocket adapter, focusing on robust error management and improved regression testing for connection failures using TypeScript and Node.js. Later, addressed a critical connectivity issue in BlueWallet/BlueWallet by updating Electrum server configurations in JavaScript, restoring wallet uptime for users. The work emphasized targeted, maintainable code changes, thorough validation, and increased test coverage, demonstrating a methodical approach to backend development, error handling, and real-time system stability in production environments.