Worked on stabilizing and modernizing development workflows across bluesky/ophyd-async and DiamondLightSource/python-copier-template. In bluesky/ophyd-async, focused on updating CI and test configurations to support Python 3.12, addressing dependency changes and improving test robustness by skipping incompatible Tango tests and refining error handling. For python-copier-template, refactored the project to adopt uv-based dependency management, streamlining environment setup and aligning CI/CD pipelines for faster, more reproducible builds. Leveraged Python, Shell, and YAML to implement these changes, emphasizing maintainability and reliability in both continuous integration and local development environments. The work addressed compatibility, reproducibility, and feedback speed in engineering workflows.