Senior Ai Full Stack Developer
Summary
The Senior AI Full Stack Developer will design and maintain a global B2B platform using React, Next.js, Node.js, and Java Spring Boot on AWS. The role focuses on integrating AI technologies like LLMs, RAG, and Generative AI into scalable web applications.
Descripción del trabajo
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
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 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
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