Worked on improving the reliability of the profiling subsystem in the DataDog/dd-trace-rb repository by addressing issues with the Datadog::Profiling module’s definition. Focused on backend development using Ruby and Ruby on Rails, the developer ensured that profiling.rb is always loaded, preventing partial module definitions when the core library is initialized without explicit configuration. This technical approach eliminated missing method errors and reduced flaky behavior in local tests, resulting in more consistent and dependable profiling experiments. The work enhanced both local development and CI stability, supporting better performance diagnostics and demonstrating careful attention to module loading and configuration handling.