Over a two-month period, contributed to the hiero-ledger/hiero-sdk-js and hiero-ledger/solo repositories by delivering targeted improvements in API clarity, platform stability, and observability. Addressed deprecated field usage in FreezeTransaction to align with evolving network standards, enhancing developer experience and reducing transaction errors. Upgraded core dependencies and improved node stability using JavaScript and TypeScript, while implementing native Ethereum transaction signing with ECDSA key support and comprehensive unit testing. In hiero-ledger/solo, integrated Java Flight Recorder metrics collection into block node performance tests, enabling detailed JVM monitoring. The work emphasized backend development, dependency management, and robust performance testing across blockchain-focused systems.