We are looking for a Frontend / Platform Engineer 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 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
Strong hands-on experience with TypeScript and JavaScript
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 GitHub 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 (DevEx) or Platform Engineering initiatives
Experience building GitHub 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 TypeScript but want to go beyond traditional frontend development , building tools and platforms that improve how other engineers work, we want to hear from you.

Apply now or reach out for more details!

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📌 Frontend / Platform Engineer – React and TypeScript (Madrid)
🏢 Infoser New Technologies
📍 Madrid