Worked on backend development for the scroll-tech/reth repository, focusing on Ethereum RPC compatibility. Addressed a specific issue by disabling EIP-3607 validation for the eth_createAccessList RPC method, enabling support for non-EOA (Externally Owned Account) senders. This targeted fix involved modifying Rust code to bypass sender validation in scenarios where EIP-3607 would otherwise reject valid non-EOA flows, thereby improving interoperability with diverse client implementations. The change reduced edge-case failures and ensured more robust handling of access list creation requests. Demonstrated expertise in Rust and Ethereum RPC protocols, with a focus on precise, compatibility-driven engineering within a complex backend system.