PbActual Talent /b is the talent acquisition consultancy that offers Executive Search, RPO and Talent Solutions. /ppbr/ppbAbout the client: /b /ppA bGerman Sustainable Tech Unicorn /b that is redefining how global corporations handle transparency. Backed by a b€130M Series C /b investment, our client has built a proprietary, serverless cloud infrastructure to ensure human rights and ecological responsibility across global supply chains. /ppbr/ppCurrently 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. /ppbr/ppbThe Mission: Impact at Scale /b /ppAs 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). /ppbr/ppbKey Responsibilities: /b /pullibSystem Architecture: /b Design and optimize scalable full-stack features, focusing on robust backend systems and high-performance frontend interfaces. /lilibInfrastructure Innovation: /b Work directly on a custom-built, serverless cloud ecosystem (the Hub). /lilibTechnical Leadership: /b Influence the design of core libraries and microservices architecture used worldwide. /lilibCollaborative Strategy: /b Work in high-density agile squads (4-6 people) alongside tech leads to define the product roadmap. /lilibQuality Advocacy: /b Drive technical excellence through rigorous code reviews, automated testing, and CI/CD best practices. /li /ulpbr/ppbYour Profile: /b /pullibExperience: /b 6+ years of professional experience in Full-Stack development, specifically within bproduct-based companies /b (no agencies or consultancies). /lilibBackend Mastery: /b Expert-level command of bNode.js /b and bTypeScript /b. /lilibFrontend Proficiency: /b Strong experience with bReact.js /b. /lilibArchitecture Mindset: /b Deep understanding of microservices, end-to-end product ownership, and scalable design patterns. /lilibCommunication: /b Fluent English (C1). Spanish is a plus but not mandatory for technical collaboration. /li /ulpbr/ppbWhat’s in it for you? /b /pullibUnlimited Growth: /b Join a unicorn at the peak of its global expansion with a direct line to leadership. /lilibGood Salary Package /b /lilibHybrid Work: /b A balanced model of b3 days in the Madrid office / 2 days remote /b /lilibPremium Benefits: /b €80/month via Thanksben + up to €200/month for transport and meals. /lilibHigh-Performance Culture: /b A world-class engineering team where technical decisions are made by developers, for developers. /li /ul