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

Contract

Fullstack Developer Node + React – Location: Barcelona (Hybrid)

Contract: Indefinite with Neotalent Conclusion.

Languages: Spanish (Advanced), English (Advanced, interview in English).

Responsibilities

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.

Qualifications

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.

What We Offer