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.

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. 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. Product engineers with backend depth and high agency 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.



You have worked in a startup or scaleup environment and understand the pace, ambiguity, and ownership it requires.

You can zoom out to understand the full picture and zoom in when details matter.

Native

Italian or Spanish is mandatory, together with professional working English. Agile and squad-based: small teams own their domains, with no unnecessary layers. Full-stack ownership: engineers are hands-on and accountable for delivered value.

Backend-leaning Product-minded Startup DNA The sweet spot: a hands-on product engineer from a startup/scaleup journey, ideally around the €3M-€30M growth stage, with backend depth and enough frontend fluency to own features end to end. Italian or Spanish proficiency (mandatory) plus professional English. 02: 30-min Talent Call - motivation, Pillar knowledge, mindset, languages, and startup fit. 03: Two 30-min Technical Interviews - one backend-focused touchpoint and one frontend/product-focused touchpoint with engineers from the team. The chance to work in an AI-native engineering team, where AI is part of both the product and the way we build it.

📌 Full Stack Developer (Hybrid/Remote) (Barcelona)
🏢 Pillar
📍 Barcelona