Factorial is hiring a Senior/Staff engineer to launch Chats, an AI‑driven product built from scratch. Ideal candidates are fullstack or mobile‑focused engineers who embrace ambiguity and want to shape architecture, UX, and the engineering culture from the ground up.
Our Barcelona or Madrid offices offer on‑site collaboration with versátil schedules and remote options. You’ll work with Rails/React/React Native, AI workflows, and agent‑powered features to redefine how software is built.