Worked on enhancing backend reliability and data integrity across the ruby/ruby, Shopify/rails, and rails/rails repositories using Ruby and Ruby on Rails. Delivered robust error handling and comprehensive testing for the Ruby Resolv TCP Requester, addressing connection resets and incomplete data scenarios to improve DNS resolver stability. In Shopify/rails, fixed ActiveRecord association handling for new records with composite primary keys, ensuring accurate querying of related data. Contributed to rails/rails by implementing query-constraint-based updates for increment! and decrement! methods, supporting precise identity handling. Emphasized network programming, backend development, and unit testing to ensure resilient, maintainable code and reliable application behavior.