B2C product design for the Vivo app, including Modo Seguro, a security hub, and Crédito Antecipado, a prepaid-credit redesign.
I helped design internal tools for teams handling incidents, refunds, tax issues, and operational workflows.
An open-source editor for composing app screens inside interactive 3D device mockups with transparent PNG export.

400 GitHub stars. A CSS and JavaScript experiment that replaced checkout spinners with animated purchase transitions.