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!

#React #TypeScript #JavaScript #Backstage #NodeJS #ExpressJS #GitHub #DeveloperExperience #PlatformEngineering #DeveloperPortal #AWS #Kubernetes #RESTAPI #FrontendEngineering #Hiring #JobOpportunity

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