Job Description

You’re the rare engineer who can both design a system and write the React component that lives on top of it. Join us to architect and build our flagship products end-to-end, while shaping the platform that makes the whole team move faster.

The Mission

As a Principal Engineer with a Full Stack & Platform mandate, your dual mission is to:

1) Act as the lead architect and hands-on builder for our most ambitious customer-facing products, owning everything from frontend architecture to backend services.

2) Identify the patterns, components, and platform capabilities that emerge from that work (the design system, the paved road, the reusable services) and turn them into building blocks for the whole engineering org.

Key Responsibilities

- Lead by Building: Architect and personally ship the most critical product surfaces,



setting the bar for end-to-end engineering quality.
- Own the Full Stack: Make sound decisions across frontend, backend, and infrastructure, and write code at every layer when needed.
- Build the Paved Road: Shape our platform (CI/CD, Kubernetes, IaC, observability) so other engineers ship faster and more safely.
- Harvest Reusable Patterns: Generalize what works into shared components, services, and architectural patterns — extending both the design system and the platform.
- Multiply Velocity: Mentor senior engineers, lead architecture conversations, and remove friction wherever it slows the team down.

📌 Principal Engineer (Madrid)
🏢 SGS
📍 Madrid