Worked on reliability, observability, and workflow improvements for DeFi infrastructure across the across-protocol/relayer and across-protocol/sdk repositories. Focused on robust Solana transaction processing, resilient WebSocket connectivity, and enhanced error handling, using TypeScript and Node.js. Introduced bounded exponential backoff for Solana WebSocket reconnections, improved error fidelity in logs, and aligned transaction logic for cross-chain flows. Enhanced cost estimation and profitability routing with dynamic configuration, and implemented Tron-specific relay fee calculations. Upgraded serverless orchestration and SDK compatibility, added health endpoints, and stabilized Redis connections. Delivered features and fixes that reduced downtime, improved diagnostics, and ensured safer, higher-uptime operations for blockchain applications.