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 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
- 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
- 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 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 or Claude
What we offer
- Hybrid model — 3 days onsite in Barcelona
- International environment with global engineering teams
- Opportunity to work on a global B2B platform used worldwide
- People-first culture with an inclusive and collaborative environment
- 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
- Wellhub: fitness, wellness, and mental health support
- Company-sponsored football and paddle teams
- Team buildings, technical communities, and international events
We 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 Notice
- The 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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