Worked on backend development for the flashbots/op-rbuilder and flashbots/rollup-boost repositories, focusing on improving stability and developer productivity. Upgraded the Reth dependency across both codebases to align with the latest ecosystem standards, ensuring compatibility and smoother future integrations. Simplified test setups in op-rbuilder by removing redundant account initialization, which reduced CI noise and accelerated feedback cycles. Refactored internal naming within OpPayloadBuilderCtx to clarify code intent and improve maintainability. Employed Rust and Cargo to manage dependencies and streamline workflows, emphasizing code clarity and robust testing practices throughout the process. Delivered four features with a focus on long-term maintainability.