Full Stack Engineer - Product Vision

About the role

We are seeking a Full Stack Engineer to join a fast‑growing client building AI‑driven tooling for the mobility industry. You will work from concept to production, shaping product direction while handling complex, messy data.

Key responsibilities

• Develop end‑to‑end features across the full stack, turning ambiguous requirements into shipped solutions.
• Design and evolve canonical data models and pipelines for real‑world data inputs.
• Define methods to resolve conflicting data and build agents that reason over data and act.
• Design agent behavior, including failure handling and recovery processes.
• Create explainable, auditable outputs and ensure robust production deployment.
• Collaborate with product teams to influence roadmap and technical decisions.

Required profile

• Strong full‑stack engineering experience with a flexible tech stack.
• Comfortable working with incomplete, inconsistent data and high ambiguity.
• Ability to take problems from concept through to production.
• Product‑oriented mindset focused on delivering outcomes.
• Willingness to form and revise strong opinions as the project evolves.
• Creative and critical thinking about what you build.

Required skills

• Ruby on Rails (API)
• PostgreSQL
• React / Next.js
• Python (data and AI orchestration)
• AWS
• Render

What we offer

• Competitive salary €40,000‑€80,000 per year.
• Meaningful equity participation.
• Flexible hybrid working (3 days in office).
• Apple hardware and beachfront Barcelona HQ.
• Generous holiday allowance plus public holidays.
• Team off‑sites in exciting locations.