We are looking for a Senior AI Full Stack Developer to join a general 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.

? What you'll do
? 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
? Collaborate with multiple engineering teams working on shared codebases
? 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
? Contribute to technical decisions, code reviews, mentoring, and engineering best practices

? Must Have
? 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
? Experience designing and integrating REST APIs
? Hands-on experience building applications on AWS
? Experience working with shared repositories using GitHub
? Experience with CI/CD pipelines
? Experience implementing unit, integration, UI, and au

📌 Senior AI Full Stack Developer (Barcelona)
🏢 Capitole
📍 Barcelona