---
title: "Senior Full-Stack Engineer (Node.js/React) – Sustainable Tech Unicorn · Madrid | Actual group"
description: "Actual Talent is the talent acquisition consultancy that offers Executive Search, RPO and Talent Solutions. About the client A German Sustainable Tech Uni…"
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  "og:description": "Actual Talent is the talent acquisition consultancy that offers Executive Search, RPO and Talent Solutions. About the client A German Sustainable Tech Uni…"
  "og:title": "Senior Full-Stack Engineer (Node.js/React) – Sustainable Tech Unicorn"
---

# Job offer :** Senior Full-Stack Engineer (Node.js/React) – Sustainable Tech Unicorn**

MadridHybrid

## **Actual Talent**

[**910 22 81 05**](tel:910228105)

[All the agency's jobs](https://www.actualgroup.com/en/jobs?recruiterCode=TTPT)

## **The role**

**Actual Talent** is the talent acquisition consultancy that offers Executive Search, RPO and Talent Solutions.

### About the client

A **German Sustainable Tech Unicorn** that is redefining how global corporations handle transparency. Backed by a **€130M Series C** investment, our client has built a proprietary, serverless cloud infrastructure to ensure human rights and ecological responsibility across global supply chains.

Currently in a massive consolidation phase, their Madrid Hub is expanding from 20 to over 100 top-tier engineers in 2026. This is your chance to join a high-growth environment where engineering quality and product ownership are the top priorities.

### The Mission: Impact at Scale

As a Senior Full-Stack Engineer you will be an architect of transparency. You will own the end-to-end development of products that help over 2,000 global companies comply with critical ESG regulations (LkSG, CSDDD).

### Key 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.

### Your Profile:e

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

### What’s in it for you?

- **Unlimited Growth:** Join a unicorn at the peak of its global expansion with a direct line to leadership.
- **Good Salary Package**
- **Hybrid Work:** A balanced model of **3 days in the Madrid office / 2 days remote**
- **Premium Benefits:** €80/month via Thanksben + up to €200/month for transport and meals.
- **High-Performance Culture:** A world-class engineering team where technical decisions are made by developers, for developers.

### **Want to join the adventure?**

Apply without waiting!

## **Apply for this job**

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