Contributed backend and database engineering to open source projects, focusing on ORM integration and data integrity. Developed TypeORM support for the electric-sql/pglite repository, enabling seamless ORM-based database interactions within PGlite environments. This work included comprehensive documentation and code examples, streamlining onboarding for TypeORM users and broadening ORM tooling compatibility. Later, addressed a cross-database upsert bug in sequelize/sequelize by correcting conflict field mapping for PostgreSQL and SQLite3, and added regression tests to ensure reliable upsert behavior. Demonstrated proficiency in JavaScript, SQL, and ORM design patterns, with a disciplined approach to documentation and cross-database reliability in backend systems.