Worked on the populationgenomics/cpg-flow and production-pipelines repositories, focusing on workflow reliability, test modernization, and security. Enhanced workflow graph rendering and logging to improve debugging and reproducibility, while refining execution logic for more robust error handling. Applied code cleanup, refactoring, and dependency management to stabilize pipelines and align with best practices. Modernized the test suite by migrating to Python’s pathlib, removing unnecessary dependencies, and standardizing test code. Addressed security vulnerabilities by upgrading core dependencies such as requests and urllib3. Leveraged Python, YAML, and CI/CD skills to deliver maintainable, secure, and reproducible pipelines supporting safer and more efficient releases.