Product Engineer

Barcelona - Onsite

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 Product Engineer who sits right between engineering and product: someone who writes production code, talks to customers and helps decide what is worth building in the first place.

The mission

Turn real customer problems into product that ships, owning both what we build and how we build it.

What you will do

• Talk to customers, understand how construction companies really work and turn what you hear into clear product decisions.

• Define features end to end: problem, scope, trade-offs, success metrics and the code that makes them real.

• Build across the stack in TypeScript, Next.js, React and Postgres, shipping fast and iterating on feedback.

• Work side by side with Design, Engineering, AI and Customer teams, so everyone knows why we are building something.

• Look at data and usage to decide what to improve, what to cut and what comes next.

• Use AI as a native part of how you discover, build and learn.

Who we are looking for

• You have built product in a startup or scaleup, ideally in the €3M to €30M growth stage, in a role where you both shipped code and shaped product decisions.

• You have a solid engineering background: you are comfortable with TypeScript, React, Next.js and Postgres, and you can own a feature from database to UI.

• You have strong product sense: you know how to frame a problem, say no to the wrong things and explain why a decision matters for the customer.

• You enjoy being close to customers and you are curious about how their work really happens, beyond what they say they need.

• You communicate clearly, in writing and in conversation, with engineers, designers and non technical people alike.

• You challenge ideas, accept trade-offs and make the people around you better.

• You are AI-native: AI is already part of how you work.

• Native Italian or Spanish, plus professional English. Based in Barcelona or willing to relocate.

How we work

• Small squads, high autonomy, no unnecessary layers.

• AI-first, in the product and in the way we build.

• Bottom-up: initiative is expected, not delegated.

• Pillar is not for you if you only want to write specs without touching code, or only write code without caring about why it matters.

Hiring process

01 CV screening

02 30-min People call with Marta

03 60-min technical conversation with our Product team (Full Stack Engineer + AI Engineer)

04 Final conversation with our CPO

What we offer

• Gross salary 65.000 to 80.000 €, based on experience

• Real ownership: from discovery and product decisions to features customers use every day

• A company that moves fast: 90+ people and 1000+ customers in under two years

• An AI-native team: AI is part of the product and of how we build it

• Close to customers: you will spend real time with the people we build for, alongside Product, AI and Engineering

• People who care: a team that celebrates wins together, gives honest feedback and has fun along the way.