Fullstack Developer Senior (Node.js + React.js)

Node.js React APIs Docker Kubernetes JavaScript TypeScript CI/CD, * Design and build responsive, high-quality user interfaces using React and Next.js.

• Develop backend services with Node.js and Fastify to implement APIs, business logic, and data flows.
• Integrate, optimize, and maintain communication between systems via APIs.
• Create scalable, maintainable, and modular software architecture.
• Implement CI/CD pipelines (preferably GitHub Actions) and write automated tests.
• Ensure application performance, reliability, and security.
• Manage containerized environments with Docker and Kubernetes; OpenShift is a plus.
• Apply clean code, comprehensive documentation, and maintainability practices.
• Contribute to InnerSource/Open Source initiatives to foster innovation and collaboration.
• Participate in Agile teams, collaborating across functions to drive optimized delivery and continuous improvement.

• Senior software engineering experience in complex applications.
• Ability to work across the stack and collaborate in Agile environments.
• Experience with data pipelines or visualizations (e.g., D3.js)., * Design and build responsive user interfaces using React and Next.js.
• Develop backend services with Node.js and Fastify.
• Integrate and optimize APIs for system communication.
• Create scalable and maintainable software architecture.
• Implement CI/CD pipelines and write automated tests., Degree in Computer Science or related field, * Senior software engineering experience delivering complex and distributed applications.
• Ability to work across the stack, contribute to architectural decisions, and collaborate in Agile and multifunctional environments.
• Degree or equivalent in Computer Science, Information Technology or related field from an accredited institution.

Technical Expertise

• Backend: solid experience with Node.js (Fastify a plus), API development, backend integrations.
• Frontend: strong experience with React and Next.js, modern CSS frameworks, and building accessible, responsive interfaces.
• Data & Visualization: experience with data pipelines or visualizations (e.g., D3.js, Chart.js, Kibana).
• Architecture: good understanding of modular software architecture, scalability, fault tolerance, recovery.
• DevOps: experience with CI/CD pipelines, GitHub Actions, automated testing, Docker, Kubernetes (OpenShift a plus).
• Databases: experience with SQL and NoSQL systems.
• GitHub Ecosystem: experience with automation in GitHub (Apps, Actions, IssueOps, GitOps); certifications are a plus.
• Languages: experience with JavaScript and TypeScript; knowledge of Python is valued.

Other Qualifications

• English required; knowledge of French and/or Spanish is valued.
• Ability to coordinate activities with multiple stakeholders in a large international organization and cross-functional teams.
• Proactive, autonomous mindset with strategic focus, centered on innovation and continuous improvement.
• Passion for information technology and software.

Neotalent Conclusion is seeking a Fullstack Developer skilled in Node and React to join our dynamic team in Barcelona. This hybrid role requires a senior software engineer to design and build robust applications leveraging modern technologies.