Full Stack Engineer
Pubblicato il 24-09-2026 - Pillar in Milano
[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.
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 environment and understand the pace, ambiguity, and ownership it requires.
- You take initiative, get your hands dirty, and get things done without waiting for perfect instructions.
- You are AI-native:
AI is already part of how you think, build, debug, learn, and move faster.
- You can zoom out to understand the full picture and zoom in when details matter.
- You learn from failure, communicate openly, and collaborate without ego.
- Native Italian or Spanish is mandatory, together with professional working English.
How we work
- Agile and squad-based: small teams own their domains, with no unnecessary layers.
- AI-first: we build and work in the age of AI.
- Full-stack ownership: engineers are hands-on and accountable for delivered value.
- Bottom-up: initiative is expected, not delegated.
The profile that can succeed
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.
Location & languages
Milan or Barcelona; native Italian or Spanish (mandatory) plus professional English.
Hiring process
01: CV screening.
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.
04: Practical Challenge - a Supabase-based exercise in an environment candidates can access.
05: Final Interview with our CTO.
What we offer
- Gross salary 55,000-75,000 €
- The opportunity to build core parts of Pillar's product and engineering foundations as we scale
- End-to-end ownership: from product decisions and architecture to shipping features used by real customers.
- The chance to work in an AI-native engineering team, where AI is part of both the product and the way we build it.
- Close collaboration with Product, AI, and Engineering, with direct exposure to the problems we are solving for customers.
- Real autonomy, responsibility, and room to grow as Pillar and the engineering team scale.
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