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 a full stack role focused on building an enterprise Developer Portal with Spotify Backstage . You will develop React-based experiences, Backstage plugins and backend integrations that help engineering teams discover platform services, get started quickly and use the tools they need. A key part of the role will be automating developer onboarding and platform synchronization , including detecting changes in Git Hub and automatically reflecting them within the Developer Portal. What you'll work with Developer Portal: Backstage Developer Ecosystem: Git Hub and engineering tooling APIs & Integration: REST APIs, asynchronous processing and external system integrations Automation: Git Hub-driven workflows and automated platform synchronization Cloud: AWS, including AWS Lambda 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 Type Script-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 Type Script, Node.js and Express Build automation that detects changes in Git Hub 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 adopting the platform Collaborate with UX specialists to design intuitive and reusable developer experiences Contribute to architectural decisions around scalability, maintainability and platform evolution Integrate cloud-native services running on AWS and Kubernetes Collaborate with engineering teams and stakeholders across different organizational areas Participate actively in technical discussions, code reviews and Agile ceremonies What we're looking for Previous hands-on experience with Backstage, Spotify’s open-source developer portal framework. Solid professional experience developing applications with React Experience with Node.js / Express Strong experience designing and consuming REST APIs Experience with asynchronous data processing and system integrations Good understanding of UI/UX principles and reusable component design Experience working with Git Hub and modern software development workflows Good understanding of system and process architectures Experience working in complex enterprise IT environments Ability to work autonomously while collaborating effectively with international and cross-functional teams Strong communication and problem-solving skills Experience working with Agile methodologies (Scrum / Kanban) What makes you stand out Experience developing Backstage plugins or working with similar Internal Developer Portals Experience with Developer Experience (Dev Ex) or Platform Engineering initiatives Experience building Git Hub integrations, webhooks or event-driven automations Experience with AWS , particularly AWS Lambda Experience deploying or operating applications on Kubernetes Experience integrating developer ecosystems such as source control, CI/CD, observability, compliance or AI tooling Understanding of Internal Developer Platforms (IDP) , developer self-service or automated onboarding If you are passionate about React and Type Script but want to go beyond traditional frontend development , building tools and platforms that improve how other engineers work, we want to hear from you. #J-18808-Ljbffr

📌 Full stack developer (spotify backstage, react & express) (Madrid)
🏢 Infoser Technological Solutions, Hardware, Big Data Experts
📍 Madrid