Fullstack Engineer – Series B AI Startup | Spain (100% Remote)

I’m partnered with a fast-scaling AI startup, fresh off a Series B raise, looking for an early hire Developer to shape the next generation of their platform. You'll build the GenAI behind some of the products that you use every single day.

This is a role for hands-on builders who enjoy owning systems end-to-end, from backend architecture to clean, functional UI. You’ll work on production-scale APIs, and tooling that powers real-time generative AI applications.

You’ll work with

• Ruby on Rails, React, TypeScript
• RESTful APIs and PostgreSQL (Prisma)
• Containerisation and orchestration (Docker, Kubernetes)
• CI/CD (GitLab, GitHub Actions), AWS/GCP
• Testing (RSpec, Jest, React Testing Library)

You bring

• Solid fullstack experience in startup or product-led teams
• Strong hands-on background with Ruby on Rails (v6+), React (v17+), JavaScript (incl. ES6+)
• SQL Databases, ideally PostreSQL
• Ability to design, build, and deploy production-ready features end-to-end
• Proficiency in database design, API development, and performance optimisation
• Solid GitHub or code samples that show technical depth and curiosity

Why join

• Series B funding and strong traction with enterprise, media, and government clients
• Work directly on real-time generative AI systems at production scale
• Collaborate with senior engineers in a small, high-impact team with no bureaucracy
• Own architecture decisions, ship fast, and see your work go live in weeks
• 100 % remote across Europe | Flexible hours | Equity included

If you want to build the infrastructure and interfaces that make AI talk, get in touch