Worked on enhancing local development and testing workflows for the flashbots/op-rbuilder repository, focusing on streamlining the developer experience and improving reliability. Delivered an integrated Builder-Playground setup that updated configuration files and enabled smoother local devnet runs, allowing for more accurate and efficient testing environments. Employed DevOps practices and leveraged Rust and YAML to refine the setup process, reducing friction for developers and supporting faster feature validation. No critical bugs were reported during this period, and efforts centered on stabilizing the development workflow, ensuring that deployments became more reliable and that the overall productivity of the engineering team was strengthened.