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