During December 2025, contributed to the actualbudget/actual repository by delivering a TypeScript-based refactor focused on improving user validation logic. Migrated the existing validate-user.js module to TypeScript, introducing explicit type annotations for request and response objects to enhance input safety and maintainability. Leveraged Express and Node.js to ensure the updated validation logic integrated seamlessly with the existing backend architecture. Updated release notes to clearly document the rationale and technical details of the refactor, supporting better stakeholder communication and onboarding. This work addressed runtime error reduction and clarified API contracts, reflecting a methodical approach to strengthening backend reliability and code clarity.