We are looking for a Senior AI Full Stack Developer to join a global team responsible for the end-to-end ownership of a worldwide B2B platform. In this role, you will design, build, and maintain high-performance, scalable, and secure web applications that support business-critical digital commerce solutions. You will collaborate with international engineering teams, contributing to a modern cloud-native architecture while ensuring excellent user experience, reliability, compliance, and operational efficiency.

Design, develop, and maintain enterprise-grade Full Stack applications supporting a global B2B platform Build modern frontend applications using React and Next.js Develop scalable backend services and REST APIs using Node.js and/or Java Spring Boot Build and deploy cloud-native applications using AWS Deliver high-quality software following clean architecture and software engineering best practices Optimize application performance, scalability, security, and reliability Implement unit, integration, UI, and automated testing strategies Contribute to CI/CD pipelines and modern DevOps practices Participate in Agile/Scrum ceremonies and cross-functional product teams Collaborate with architects, product managers, UX designers, QA engineers,



and international stakeholders 5+ years of experience as a Full Stack Software Engineer Strong experience with React and/or Next.js Experience developing backend applications using Node.js and/or Java Spring Boot Strong knowledge of JavaScript , TypeScript , or Java Hands-on experience building applications on AWS Experience working with shared repositories using GitHub Experience implementing unit, integration, UI, and automated testing Experience working in Agile/Scrum environments Strong software engineering fundamentals, problem-solving skills, and collaborative mindset Fluent English (mandatory) Experience integrating LLMs , Generative AI , RAG , or Agentic AI into web applications Experience with data pipelines and AI-enabled backend services Hybrid model — 3 days onsite in Barcelona International environment with integral engineering teams Opportunity to work on a global B2B platform used worldwide Work on enterprise-scale digital commerce solutions with modern technologies ☁️ Build cloud-native applications on AWS Opportunity to contribute to AI-enabled software initiatives €1,200 annual training budget Private health insurance Flexible working hours ️ Information Security Notice The employee will have access to confidential information related to Capitole and the assigned project.

📌 Remote - Senior Full Stack Developer (Barcelona)
🏢 Capitole
📍 Barcelona