Senior Ai Full Stack Developer

We are looking for aSenior AI Full Stack Developerto 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 usingReactandNext.jsDevelop scalable backend services and REST APIs usingNode.jsand/orJava Spring BootBuild and deploy cloud-native applications usingAWSCollaborate 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 withReactand/orNext.jsExperience developing backend applications usingNode.jsand/orJava Spring BootExperience designing and integratingREST APIsHands?on experience building applications onAWSExperience working with shared repositories usingGitHubExperience 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 integratingLLMs ,Generative AI ,RAG , orAgentic AIinto web applicationsExperience with data pipelines and AI-enabled backend servicesFamiliarity with AI development tools such asCursororClaudeWhat we offerHybrid model -3 days onsite in BarcelonaInternational environment with global engineering teamsOpportunity to work on a global 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.#J-*****-Ljbffr

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 automated testing Experience working in Agile/Scrum environments Strong software engineering fundamentals, problem?solving skills, and collaborative mindset Experience integrating LLMs , Generative AI , RAG , or Agentic AI into web applications Experience with data pipelines and AI-enabled backend services Familiarity with AI development tools such as Cursor