Lead Full Stack Engineer - Cloud SaaS Platform

United States Digital Space LLC is seeking a Lead Full Stack Engineer to own the technical direction of a modern cloud-based SaaS platform. The role blends hands-on development with technical leadership in a hybrid UK/London setting.

You will design scalable, API-first architectures, mentor engineers, and collaborate with stakeholders to deliver data-driven features and automation. A strong backend (Node.js/Express) and frontend (React/Vite) stack is essential.