AI-Native Backend-Heavy Full Stack Engineer (Milan/Barcelona)

Pillar; Lombardia; On-site; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Gross salary 55k-75k €

AI-native engineering team

Autonomy & growth opportunities

Job summary

Pillar is hiring a product-minded Full Stack Engineer with backend depth to join our AI-native team in Milan or Barcelona. You will own features end to end, strengthen backend architecture, and collaborate with Product, AI, and Engineering to ship value to customers.

We seek someone who works well in a startup/scaleup pace, is comfortable with Next.js, React, TypeScript, Supabase, Node/Deno, Postgres, and Mastra, and who writes robust, scalable code in a fast-moving environment.

Qualifications

• Strong backend depth with product focus.
• Startup/scaleup pace experience and ownership.
• Familiar with Next.js, React, TypeScript, and modern backend/data patterns.
• Italian or Spanish native with professional English.

Responsibilities

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

Skills

Backend depth

Next.js

React

TypeScript

Supabase

Node/Deno

Postgres

AI-native workflows

Frontend capability

Tools

Mastra

Supabase

PostgreSQL

Node/Deno

AI-native workflows

Job description

Pillar is hiring a product-minded Full Stack Engineer with backend depth to join our AI-native team in Milan or Barcelona. You will own features end to end, strengthen backend architecture, and collaborate with Product, AI, and Engineering to ship value to customers.

We seek someone who works well in a startup/scaleup pace, is comfortable with Next.js, React, TypeScript, Supabase, Node/Deno, Postgres, and Mastra, and who writes robust, scalable code in a fast-moving environment.