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.What you'll doDesign, develop, and maintain enterprise‑grade Full Stack applications supporting a global B2B platformBuild modern frontend applications using React and Next.jsDevelop scalable backend services and REST APIs using Node.js and/or Java Spring BootBuild and deploy cloud-native applications using AWSCollaborate with multiple engineering teams working on shared codebasesDeliver high-quality software following clean architecture and software engineering best practicesOptimize application performance, scalability, security, and reliabilityImplement unit, integration, UI, and automated testing strategiesContribute to CI/CD pipelines and modern DevOps practicesParticipate in Agile/Scrum ceremonies and cross-functional product teamsCollaborate with architects, product managers, UX designers, QA engineers, and international stakeholdersContribute to technical decisions, code reviews, mentoring,



and engineering best practices5+ years of experience as a Full Stack Software EngineerStrong experience with React and/or Next.jsExperience developing backend applications using Node.js and/or Java Spring BootExperience designing and integrating REST APIsHands‑on experience building applications on AWSExperience working with shared repositories using GitHubExperience with CI/CD pipelinesExperience implementing unit, integration, UI, and automated testingExperience working in Agile/Scrum environmentsStrong software engineering fundamentals, problem‑solving skills, and collaborative mindsetExperience integrating LLMs, Generative AI, RAG, or Agentic AI into web applicationsExperience with data pipelines and AI-enabled backend servicesFamiliarity with AI development tools such as Cursor or ClaudeWhat we offerHybrid model — 3 days onsite in BarcelonaInternational environment with global engineering teamsOpportunity to work on a integral B2B platform used worldwidePeople-first culture with an inclusive and collaborative environmentWork on enterprise‑scale digital commerce solutions with modern technologiesBuild cloud-native applications on AWSOpportunity to contribute to AI-enabled software initiatives€1,200 annual training budgetWellhub: fitness, wellness, and mental health supportCompany-sponsored football and paddle teamsTeam buildings, technical communities, and international eventsWe know that not every candidate will meet 100% of the requirements. If your experience is close and you're excited about the opportunity, we'd love to hear from you!Information Security NoticeThe employee will have access to confidential information related to Capitole and the assigned project.Compliance with internal security and information protection policies is mandatory.
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📌 Senior AI Full Stack Developer (Barcelona)
🏢 Capitole
📍 Barcelona