A legacy Perl-based automation system was becoming unmaintainable, slowing down critical engineering workflows and lacking test coverage.
Ported the entire logic to Python 3, following clean code principles and implementing a comprehensive test suite with 90%+ coverage.
Prioritized bit-for-bit output parity with the legacy system during the transition, allowing for a phased and safe cutover without service interruption.
Reverse engineering complex business rules embedded in ancient scripts with no existing documentation.