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# Senior Full-Stack Engineer (Node.Js/React) - Hybrid, Esg Impact

- **Company:** Actual Talent
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Automation of Tests, Cloud Computing, Code Review, Continuous Integration, Modular Design, Node.Js, Systems Architecture, ReactJS, Backend, Front End Software Development, Serverless Computing, Microservices
- **Published:** September 15, 2026
- **Apply:** https://www.buscojobs.com.es/senior-full-stack-engineer-node-js-react-hybrid-esg-impact-en-madrid-ID-370723280

## About the Role

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:eExperience: 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?

## Description

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 ****.This is your chance to join a high-growth environment where engineering quality and product ownership are the top priorities.The Mission: Impact at ScaleAs 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:eExperience: 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 PackageHybrid Work: A balanced model of 3 days in the Madrid office / 2 days remotePremium 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.#J-*****-Ljbffr


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