Senior Frontend Engineer — Lead UI for Earth's AI Platform

Xoople SL; Tres Cantos; On-site; EUR 80,000 - 110,000; Full time

Job summary

Xoople SL in Madrid is seeking a Senior Frontend Software Engineer to shape the frontend layer of our web-based products. You will translate Earth observation data into intuitive, production-grade interfaces and collaborate across UX/UI, backend, cloud, data and DevOps teams.

You will design resilient architectures, establish frontend standards, and mentor engineers while delivering secure, scalable solutions for customers and partners. This role offers growth in a mission-driven environment.

Qualifications

• 6+ years in web software development with customer-facing portals.
• Strong frontend expertise in React, TypeScript, HTML/CSS and modern UI tooling.
• Experience designing scalable, cloud-native frontend architectures.
• Proficient in REST API integration, security and data protection.
• Experience with testing, CI quality gates and observability.
• Excellent English and Spanish, degree in CS or related field.

Responsibilities

• Shape frontend architecture for modular, scalable portal.
• Translate complex data into intuitive interfaces and visualizations.
• Define frontend testing strategy and CI quality gates.
• Collaborate with UX/UI, backend, cloud, data and DevOps.
• Mentor engineers, lead code reviews and manage tech debt.
• Ensure security, GDPR, and EU AI Act compliance in frontend.

Skills

6+ years web development

Frontend expertise: JS/TS/HTML/CSS/RE

Tailwind CSS

Cloud-native frontend design

REST API security

Tech leadership & code reviews

English & Spanish communication

Education

Bachelor's degree in Computer Science or related

Tools

Storybook

Git

CI/CD pipelines

Job description

Xoople SL in Madrid is seeking a Senior Frontend Software Engineer to shape the frontend layer of our web-based products. You will translate Earth observation data into intuitive, production-grade interfaces and collaborate across UX/UI, backend, cloud, data and DevOps teams.

You will design resilient architectures, establish frontend standards, and mentor engineers while delivering secure, scalable solutions for customers and partners. This role offers growth in a mission-driven environment.