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 (Madrid)
🏢 Infoser New Technologies
📍 Madrid