We're looking for a Full Stack Engineer for one of our clients who enjoys building new products from the ground up and is eager to help shape AI tooling for the mobility industry.

- Work across the full stack to solve complex problems using incomplete and messy data
- Design and evolve canonical data models
- Build pipelines to handle real-world data inputs
- Define and implement methods to resolve conflicting data
- Build and orchestrate agents that reason over data and take action
- Design agent behavior, including failure and recovery processes
- Create outputs that are explainable and auditable
- Ship features from idea through to production
- Help shape product direction, not just implement technical decisions
- Strong full-stack engineering skills (tech stack experience is adaptable)
- Comfortable working with ambiguity and messy,



inconsistent data
- Ability to take problems from concept to shipped solution
- Product-oriented mindset, focused on delivering outcomes
- Open to forming and revising strong opinions as the project evolves
- Demonstrated ability to think creatively and critically about what you build
- Ruby on Rails (API)
- React / Next.js
- Python (data and AI orchestration)
- Competitive salary: €40,000 to €80,000
- Meaningful equity
- Flexible working (3 days in office)
- Barcelona HQ with beachfront location
- Generous holiday allowance plus public holidays
- Team off-sites in exciting locations

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📌 Full-Stack AI Tooling Engineer — Product Vision & Equity - Joppy (Barcelona)
🏢 Joppy
📍 Barcelona