Senior AI Full-Stack Engineer - Hybrid (Barcelona)

Capitole; Barcelona; Híbrido; EUR 90.000 - 120.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Hybrid model

3 days onsite in Barcelona

Descripción de la vacante

Capitole is seeking a Senior AI Full Stack Developer to join a global team responsible for end-to-end ownership of a worldwide B2B platform. You will design, build, and maintain high-performance web applications with a cloud-native architecture, ensuring reliability, security, and superior user experience.

The role involves developing frontend with React/Next.js, backend with Node.js or Java Spring Boot, deploying cloud-native apps on AWS, and collaborating across international teams in an Agile

Formación

• 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 GitHub and CI/CD pipelines.
• Experience implementing unit, integration, UI, and automated testing.
• Experience working in Agile/Scrum environments.
• 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.

Responsabilidades

• 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 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.

Conocimientos

React

Next.js

Node.js

Java Spring Boot

JavaScript

TypeScript

REST APIs

AWS

GitHub

CI/CD

Testing

Agile/Scrum

English

LLMs

Generative AI

RAG

Agentic AI

AI data pipelines

Cursor

Claude

Herramientas

Cursor

Claude

Descripción del empleo

Capitole is seeking a Senior AI Full Stack Developer to join a global team responsible for end-to-end ownership of a worldwide B2B platform. You will design, build, and maintain high-performance web applications with a cloud-native architecture, ensuring reliability, security, and superior user experience.

The role involves developing frontend with React/Next.js, backend with Node.js or Java Spring Boot, deploying cloud-native apps on AWS, and collaborating across international teams in an Agile