Worked on backend development for the bluealloy/revm repository, focusing on optimizing gas handling in Rust. Addressed a bug by implementing logic to skip reimbursement and reward processing when fee charges are disabled, thereby reducing unnecessary computation in the handler. This targeted fix improved runtime efficiency and cost predictability in scenarios where fee toggling is used, enhancing the stability of fee-toggle flows. The solution involved careful modification of handler logic to ensure that gas usage and potential costs were minimized without affecting other functionality. Demonstrated proficiency in Rust and backend systems, delivering a focused improvement to the repository’s operational reliability.