Worked on enhancing the user registration experience for the Brain-up/brn repository by implementing robust validation and clearer error feedback within the registration flow. Focused on both server-side and client-side validation, the work ensured that the 'agreed' checkbox was properly validated and that error handling could distinguish between agreement-status errors and server errors. Updated Handlebars templates to accurately reflect gender selections, supporting accessibility and localization readiness. Leveraged Ember.js, JavaScript, and TypeScript to refactor frontend logic, improve template data binding, and deliver actionable feedback to users, ultimately aiming to reduce friction and enable better analytics on registration conversions.