Senior Full-Stack Engineer - Remote, AI-Powered SaaS

N-iX in Europe is seeking a Senior Full-Stack Engineer to join a team building a modern, large-scale platform that powers intelligent agreement management for millions of users worldwide. The platform supports document creation, sending, signing, and management with a widget-based front-end. You will design and develop high-performance frontend with React and TypeScript, build backend services with Node.js/Express, and contribute to micro-frontend architecture and platform capabilities across J…