About this role
Senior Full Stack Developer (Node.js Focus) – Open-Source AI Platform at Yopeso Romania SRL. Location: Madrid, Comunidad de Madrid, Spain. Role: own backend, integrate AI, design DB Requirements: Senior full stack developer with backend focus in Node.js, experience with OpenAI/LLMs, database design (MongoDB/PostgreSQL), and React frontend; hybrid work in Madrid; English fluency required. Category: Software Development Seniority: Senior Level Tools: Node.js, Express.js, MongoDB, PostgreSQL, Redis, REST API, JWT, React.js, TypeScript, Vite, TailwindCSS, Radix UI, Headless UI, Tanstack Query, Docker, Docker Compose, ESLint, Prettier Commitment: Full Time Workplace: Hybrid Languages: English