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 Gen AI 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, Type Script RESTful APIs and Postgre SQL (Prisma) Containerisation and orchestration (Docker, Kubernetes) CI/CD (Git Lab, Git Hub Actions), AWS/GCP Testing (RSpec, Jest, React Testing Library) You bring Solid full‑stack experience in startup or product‑led teams SQL Databases, ideally Postgre SQL Ability to design, build, and deploy production‑ready features end‑to‑end Proficiency in database design, API development,



and performance optimisation Solid Git Hub or code samples that show technical depth and curiosity 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 | Adaptable hours | Equity included If you want to build the infrastructure and interfaces that make AI talk, get in touch. Seniority level Mid‑Senior level Employment type Full‑time Job function Engineering, Information Technology, and Design Industries Software Development IT System Custom Software Development Broadcast Media Production and Distribution #J-18808-Ljbffr

📌 Full stack engineer (Santander)
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