Salary: 80K – 150KIndustry: Health-Tech / AILocation: Remote-First (Spain/UK) with a vibrant hub in BarcelonaStack: Python, FastAPI, asyncio, pydantic, RAG, Multi-agent LLMs, GCP, Redis, Postgres, Docker, Kubernetes, OTELThe CompanyYou will be joining a high-growth Health-Technology venture based in Barcelona that has just hit a major inflection point. They are the innovators behind a cutting-edge AI assistant that acts as a digital partner for clinical teams, recently going live with major health systems across Europe.They are scaling rapidly to meet significant healthcare contracts, moving from MVP to large-scale production. This is an international team of clinical experts and elite engineers who believe AI should solve mission-critical medical problems in real-time. If you want to build the technical foundation of a future leader in healthcare AI, this is your moment.The RoleAs an AI Engineer (Backend), you will take end-to-end ownership of Cortex, the core AI "brain" architecture powering the entire platform.



This is a backend-first role—your mission is to make the AI systems incredibly reliable, ultra-fast, compliant, and deeply observable in production, rather than inventing new ML models from scratch.In this high-autonomy role, you will collaborate directly with a tight-knit, best-in-class AI team to solve some of the hardest challenges in the industry: real-time voice AI, automated AI audits, patient simulators, and safety-critical escalation systems in a highly regulated medical environment.Your ResponsibilitiesScale & Own "Cortex": Architect, deploy, and maintain robust, modular backend systems using clean architectural principles (SOLID, Clean/Hexagonal Architecture, DDD). Manage service boundaries, reliability targets, and proactively mitigate failure modes.Orchestrate Multi-Agent Systems: Wire up complex multi-agent orchestration, managing routing between agents, shared state, and clean tool interfaces.Optimize the RAG Pipeline: Engineer high-signal re

📌 AI Engineer (Barcelona)
🏢 Blu Selection
📍 Barcelona