Senior Full-Stack Engineer (Node/React) – Hybrid Madrid

Senior Full-Stack Engineer (Node.js/React) – Sustainable Tech Unicorn; Madrid; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work: 3 days in Madrid / 2 days

€80/month Thanksben

Transport & meals up to €200/month

Growth opportunities and premium tech

Job summary

German Sustainable Tech Unicorn in Madrid is seeking a Senior Full-Stack Engineer to own end-to-end development of ESG-focused products that help 2,000+ global companies comply with regulations.

You will design scalable backend with Node.js/TypeScript and frontend with React.js, lead technical choices in microservices, and collaborate in agile squads. English is required; Spanish is a plus.

Hybrid work model in Madrid with growth opportunities and premium benefits in a high-growth environment.

Qualifications

• 6+ years of professional experience in Full-Stack development, specifically within product-based companies (no agencies or consultancies).
• Expert-level command of Node.js and TypeScript.
• Strong experience with React.js.
• Deep understanding of microservices, end-to-end product ownership, and scalable design patterns.
• Fluent English (C1). Spanish is a plus but not mandatory for technical collaboration.

Responsibilities

• System Architecture: Design and optimize scalable full-stack features, focusing on robust backend systems and high-performance frontend interfaces.
• Infrastructure Innovation: Work directly on a custom-built, serverless cloud ecosystem (the Hub).
• Technical Leadership: Influence the design of core libraries and microservices architecture used worldwide.
• Collaborative Strategy: Work in high-density agile squads (4-6 people) alongside tech leads to define the product roadmap.
• Quality Advocacy: Drive technical excellence through rigorous code reviews, automated testing, and CI/CD best practices.

Skills

Node.js

TypeScript

React.js

Microservices

Product ownership

English (C1)

Tools

Backend architecture

Job description

German Sustainable Tech Unicorn in Madrid is seeking a Senior Full-Stack Engineer to own end-to-end development of ESG-focused products that help 2,000+ global companies comply with regulations.

You will design scalable backend with Node.js/TypeScript and frontend with React.js, lead technical choices in microservices, and collaborate in agile squads. English is required; Spanish is a plus.

Hybrid work model in Madrid with growth opportunities and premium benefits in a high-growth environment.