Worked on the apache/couchdb repository to enhance the test suite’s performance and maintainability using Elixir for backend development. Refactored test files by replacing length-based list checks with Enum.empty?/1, which reduced unnecessary list traversal and improved test execution speed. This approach addressed new static analysis warnings from Credo 1.7.14, resulting in cleaner code and more reliable continuous integration runs. The changes preserved the original test semantics while making the codebase easier to maintain and review. Focused on backend engineering practices, the work demonstrated attention to both performance optimization and code quality within the Elixir ecosystem.