Pillar was founded in 2025. Today, we are 90+ people, serve 1000+ customers, raised €15.2M (pre-seed and seed round) 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 Head of Engineering who has built production systems with their own hands, loves making a platform stronger as it grows and wants to lead the engineers who build it.

Why join now
We have product-market fit and our customers, users and data are growing fast. Now we need someone who makes sure the platform holds as everything grows many times over, without slowing down delivery.

The mission
Own the health, scalability and day-to-day operation of Pillar's platform: lead our engineers, keep delivery fast and the system strong, side by side with our CPO.

What you will do
• Lead and grow our engineers, who report directly to you.
• Make sure the system scales as customers, users and data per customer grow.




• Make the infrastructure calls that keep the platform easy to run, weighing each option against its DevOps and running cost.
• Set and look after the standards for architecture, code quality, testing and reviews across the monorepo.
• Map technical debt, prioritise it and pay it down with a plan everyone can see.
• Balance short-term delivery and long-term health, and make the trade-offs clear to Product.
• Run engineering operations day to day: reliability, incidents, releases, on-call and team rituals.

Who we are looking for
Builders at heart who think at scale and lead with care
• You have built and shipped production systems yourself, and you can still go deep in code reviews and design docs.
• You have experience in B2B SaaS, ideally multi-tenant platforms with data-heavy workflows.
• You have lived a 1 to 10 phase: scaling a product, its architecture and its engineering team after product-market fit.
• You have made

📌 Head of Engineering (Barcelona)
🏢 Pillar
📍 Barcelona