Worked on the formbricks/formbricks repository to enhance the robustness of contact attribute management, focusing on CSV import handling. Developed a feature that treats language as a default contact attribute, implementing case-insensitive matching to prevent duplication caused by variations in the Language column. Utilized TypeScript and SQL to introduce environment-level attribute initialization and performed a data migration to update existing environments. Updated the test suite to ensure consistent handling of language with other default attributes, improving data integrity and reducing import errors. The work demonstrated a methodical approach to backend development, API design, and database migration within a production codebase.