[Based in Milan or Barcelona Office]

Pillar was founded in 2025. Today, we are 80+ people, serve 900+ customers, raised €12 million in 2026, and are expanding internationally.
We are building the financial operating system for construction: bringing AI, automation, and modern software to an enormous industry still full of slow, fragmented processes.
We are looking for a product-minded Full Stack Engineer who leans backend, moves fast, and wants to build.

The mission
Build product end to end, with particular strength on backend architecture and execution. Our frontend capability is already strong; we now want someone who can deepen the team on backend while still owning the full product picture.

What you will do
• Own features end to end, from product problem to production.
• Build across our TypeScript codebase using Next.js, React, Supabase, Node/Deno, Postgres, and Mastra.
• Take strong ownership of backend logic, data models, APIs, integrations, and product architecture.
• Work hands-on on the frontend when needed, with a strong preference for engineers comfortable with Next.js.




• Use AI as a native part of your engineering workflow - not only as a feature you build.
• Work in small squads with high autonomy and bottom-up initiatives.
• Move quickly from ambiguity to working product, making pragmatic technical decisions along the way.
• Raise the engineering bar through collaboration, judgment, and execution.

Our stack
• Product: Next.js · React · TypeScript
• Backend & data: Supabase · Node/Deno · Postgres
• AI: Mastra · AI-native workflows

Who we are looking for
Product engineers with backend depth and high agency
• You are a product engineer: you build outcomes, not just code.
• You are stronger on backend or genuinely full stack. Pure frontend profiles are not our priority for this hire.
• You are comfortable with Next.js, React, TypeScript, and modern backend/data patterns. Supabase experience is a strong plus.
• You have worked in a startup or scaleup

📌 Full Stack Engineer (Barcelona)
🏢 Pillar
📍 Barcelona