We are an international technology scale-up in a strong growth phase, building our own product with a strong focus on Artificial Intelligence, Data and Automation .
Our mission is to transform the way people invest in Real Estate by combining AI, advanced analytics and technology . Operating across multiple international markets, we are entering a key stage of growth where Artificial Intelligence will become a core pillar of both our product and engineering strategy .

We’re looking for a Senior Software Engineer who thinks like an owner, not a ticket-taker. This is a cross-functional role : you’ll work on complex projects across multiple teams with a high level of autonomy, taking ideas from a high-level problem statement through to production. You’ll have the experience to design and defend backend architecture , along with the product mindset to understand why we’re building something, not just what we’re building.
Design and defend backend architecture: event-driven systems on AWS, built to be resilient, cost-aware, and scalable.




Contribute across the frontend in our React / Next.js ecosystem when the work calls for it.
A strong backend engineer with proven Node.js experience designing scalable, event-driven architectures and structuring well-modeled databases. AWS expertise: especially in designing scalable, event-driven cloud architectures, with a strong understanding of distributed systems, serverless patterns, APIs, messaging, observability and data architecture.
A genuine owner: you take a problem from an ambiguous idea to a shipped product and you're comfortable adapting as priorities shift with demand in a fast-growing startup.
You already use AI in your daily engineering flow and have opinions about where it helps and where it doesn't.
Fluent in Spanish and English.

Frontend: production-grade experience with React.js/Next.js building complex, performant UIs, components, etc. Hands-on experience building and integrating solutions on top of the HubSpot pl

📌 Senior Software Engineer (Madrid)
🏢 Cv-Library
📍 Madrid