Worked on the paradigmxyz/reth repository to enhance Ethereum node development by improving RPC middleware integration and error handling. Addressed a missing trait bound for RpcMiddleware in RethRpcAddOns for EthereumAddOns, which increased type safety and reliability in backend operations. Developed and contributed a concrete example demonstrating how to launch a node with custom RPC middleware, enabling developers to tailor error messages for clearer user feedback. The work focused on backend development using Rust and Ethereum technologies, providing practical patterns for node operators to customize deployments. These targeted improvements contributed to more robust, maintainable, and developer-friendly Ethereum node implementations.