We are looking for a Full Stack Developer (React and Express) to help build and evolve an enterprise Developer Portal, designed to provide development teams with a single, scalable entry point to tools, services and engineering capabilities.
This is not a traditional frontend role. You will work at the intersection of Frontend Engineering, Developer Experience and Platform Engineering, building React-based experiences, Backstage plugins and integrations that make it easier for engineering teams to discover, onboard and interact with platform services.
A key part of the role will be automating developer onboarding and platform synchronization, including detecting changes in GitHub and automatically reflecting them within the Developer Portal.

What you'll work with
- Frontend: React, TypeScript, JavaScript
- Backend / Integration: Node.js, Express
- Developer Portal: Backstage
- Developer Ecosystem: GitHub and engineering tooling
- APIs & Integration: REST APIs, asynchronous processing and external system integrations
- Automation:



GitHub-driven workflows and automated platform synchronization
- Cloud: AWS, including AWS Lambda
- Runtime & Containers: Kubernetes
- Architecture: Enterprise portal architecture, scalability and reusable components
- UX: Reusable UI components and developer-centric experiences
- Ways of working: Agile (Scrum / Kanban), cross-functional and international teams

What you'll do
- Design, develop and evolve React and TypeScript-based components for an enterprise Developer Portal
- Build and maintain Backstage plugins to integrate internal and external engineering systems
- Develop backend and integration capabilities using TypeScript, Node.js and Express
- Build automation that detects changes in GitHub and automatically synchronizes relevant information with the Developer Portal
- Develop REST API integrations and asynchronous data-processing workflows
- Create tools that simplify the onboarding of development teams and reduce friction when

📌 Full Stack Developer (Madrid)
🏢 Infoser New Technologies
📍 Madrid